- All-America Football Conference founded.
- Aligned into Eastern and Western divisions.
| Eastern Division |
Western Division
|
| Brooklyn Dodgers |
Chicago Rockets
|
| Buffalo Bisons |
Cleveland Browns
|
| Miami Seahawks |
Los Angeles Dons
|
| New York Yankees |
San Francisco 49ers
|
- Baltimore Colts enfranchised in Eastern Division.
- Buffalo Bisons renamed Buffalo Bills.
- Miami Seahawks fold.
- Realigned into single table.
- Brooklyn Dodgers and New York Yankees merge into Brooklyn/New York Yankees.
- Chicago Rockets renamed Chicago Hornets.
- Folded.
- Baltimore Colts and San Francisco 49ers moved to National Football League American Conference.
- Cleveland Browns moved to National Football League National Conference.
- American Football League founded.
- Aligned into Eastern and Western divisions.
| Eastern Division |
Western Division
|
| Boston Patriots |
Dallas Texans
|
| Buffalo Bills |
Denver Broncos
|
| Houston Oilers |
Los Angeles Chargers
|
| New York Titans |
Oakland Raiders
|
- Los Angeles Chargers relocate as San Diego Chargers.
- Dallas Texans relocate as Kansas City Chiefs.
- New York Titans renamed New York Jets.
- Miami Dolphins enfranchised in Eastern Division.
- Cincinnati Bengals enfranchised in Western Division.
- Folded.
- Boston Patriots, Buffalo Bills, Miami Dolphins, and New York Jets moved to National Football League American Conference Eastern Division.
- Cincinnati Bengals and Houston Oilers moved to National Football League American Football Conference Central Division.
- Denver Broncos, Kansas City Chiefs, Oakland Raiders, and San Diego Chargers moved to National Football League American Football Conference Western Division.
- Canadian Football League founded.
- Aligned into Interprovincial Rugby Football and Western Interprovincial Football unions.
| Interprovincial Rugby Foootball Union |
Western Interprovincial Football Union
|
| Hamilton Tiger-Cats |
BC Lions
|
| Montreal Alouettes |
Calgary Stampeders
|
| Ottawa Rough Riders |
Edmonton Eskimos
|
| Toronto Argonauts |
Saskatchewan Roughriders
|
|
Winnipeg Blue Bombers
|
- Realigned into Eastern Football Conference and Western Interprovincial Football Union.
| Eastern Football Conference |
Western Interprovincial Football Union
|
| Hamilton Tiger-Cats |
BC Lions
|
| Montreal Alouettes |
Calgary Stampeders
|
| Ottawa Rough Riders |
Edmonton Eskimos
|
| Toronto Argonauts |
Saskatchewan Roughriders
|
|
Winnipeg Blue Bombers
|
- Realigned into Eastern Football and Western Football conferences.
| Eastern Football Conference |
Western Football Conference
|
| Hamilton Tiger-Cats |
BC Lions
|
| Montreal Alouettes |
Calgary Stampeders
|
| Ottawa Rough Riders |
Edmonton Eskimos
|
| Toronto Argonauts |
Saskatchewan Roughriders
|
|
Winnipeg Blue Bombers
|
- Realigned into Eastern and Western divisions.
| Eastern Division |
Western Division
|
| Hamilton Tiger-Cats |
BC Lions
|
| Montreal Alouettes |
Calgary Stampeders
|
| Ottawa Rough Riders |
Edmonton Eskimos
|
| Toronto Argonauts |
Saskatchewan Roughriders
|
|
Winnipeg Blue Bombers
|
- Montreal Alouettes fold.
- Montreal Concordes enfranchised in Eastern Division.
- Montreal Concordes renamed Montreal Alouettes.
- Montreal Alouettes fold.
- Winnipeg Blue Bombers moved to Eastern Division.
- Sacramento Gold Miners enfranchised in Western Division.
- Baltimore CFLers and Shreveport Pirates enfranchised in Eastern Division.
- Las Vegas Posse enfranchised in Western Division.
- Realigned into Northern and Southern divisions.
- Baltimore CFLers renamed Baltimore Stallions.
- Birmingham Barracudas, Memphis Mad Dogs, and San Antonio Texans enfranchised.
- Las Vegas Posse or Sacramento Gold Miners fold.
| Northern Division |
Southern Division
|
| BC Lions |
Baltimore Stallions
|
| Calgary Stampeders |
Birmingham Barracudas
|
| Edmonton Eskimos |
Memphis Mad Dogs
|
| Hamilton Tiger-Cats |
San Antonio Texans
|
| Ottawa Rough Riders |
Shreveport Pirates
|
| Saskatchewan Roughriders |
|
| Toronto Argonauts |
|
| Winnipeg Blue Bombers |
|
- Realigned into Eastern and Western divisions.
- Baltimore Stallions relocate as Montreal Alouettes.
- Birmingham Barracudas, Memphis Mad Dogs, San Antonio Texans, and Shreveport Pirates fold.
| Eastern Division |
Western Division
|
| Hamilton Tiger-Cats |
BC Lions
|
| Montreal Alouettes |
Calgary Stampeders
|
| Ottawa Rough Riders |
Edmonton Eskimos
|
| Toronto Argonauts |
Saskatchewan Roughriders
|
|
Winnipeg Blue Bombers
|
- Ottawa Rough Riders fold.
- Winnipeg Blue Bombers moved to Eastern Division.
- Ottawa Renegades enfranchised.
- Winnipeg Blue Bombers moved to Western Division.
- Ottawa Renegades fold.
- Winnipeg Blue Bombers moved to Eastern Division.
- Ottawa enfranchised in Eastern Division.
- Winnipeg Blue Bombers moved to Western Division.
Major League Baseball
edit
- National League founded.
- National League aligned into single-table.
| National League
|
| Boston Red Caps
|
| Chicago White Stockings
|
| Cincinnati Reds
|
| Hartford Dark Blues
|
| Louisville Grays
|
| New York Mutuals
|
| Philadelphia Athletics
|
| St. Louis Brown Stockings
|
- Hartford Dark Blues relocate as Hartfords of Brooklyn.
- New York Mutuals and Philadelphia Athletics fold.
- Hartfords of Brooklyn, Louisville Grays, and St. Louis Brown Stockings fold.
- Indianapolis Blues, Milwaukee Grays, and Providence Grays enfranchised.
- Buffalo Bisons, Cleveland Blues, Syracuse Stars, and Troy Trojans enfranchised.
- Indianapolis Blues and Milwaukee Grays fold.
- Syracuse Stars fold.
- Worcester Ruby Legs enfranchised.
- Cincinnati Reds fold.
- Detroit Wolverines enfranchised.
- Boston Red Caps renamed Boston Beaneaters.
- New York Giants and Philadelphia Quakers enfranchised.
- Troy Trojans and Worcester Ruby Legs fold.
- Cleveland Blues fold.
- New York Gothams renamed New York Giants.
- St. Louis Maroons moved from Union Association.
- Buffalo Bisons and Providence Grays fold.
- Kansas City Cowboys and Washington Senators enfranchised.
- Kansas City Cowboys.
- Pittsburgh Alleghenys moved from American Association.
- St. Louis Maroons relocate as Indianapolis Hoosiers.
- Cleveland Spiders moved from American Association.
- Detroit Wolverines fold.
- Brooklyn Bridegrooms and Cincinnati Reds moved from American Association.
- Chicago White Stockings renamed Chicago Colts.
- Indianapolis Hoosiers and Washington Senators fold.
- Philadelphia Quakers renamed Philadelphia Phillies.
- Brooklyn Bridegrooms renamed Brooklyn Grooms.
- Pittsburgh Alleghenys renamed Pittsburgh Pirates.
- Baltimore Orioles, Louisville Colonels, St. Louis Browns, and Washington Senators moved from American Association.
- Brooklyn Grooms renamed Brooklyn Bridegrooms.
- Chicago Colts renamed Chicago Orphans.
- Brooklyn Bridegrooms renamed Brooklyn Superbas.
- St. Louis Browns renamed St. Louis Perfectos.
- Baltimore Orioles, Cleveland Spiders, Louisville Colonels, and Washington Senators fold.
- St. Louis Perfectos renamed St. Louis Colonels.
- American League founded.
- American League aligned into single table.
| American League |
National League
|
| Baltimore Orioles |
Boston Beaneaters
|
| Boston Americans |
Brooklyn Superbas
|
| Cleveland Blues |
Chicago Orphans
|
| Detroit Tigers |
Cincinnati Reds
|
| Milwaukee Brewers |
New York Giants
|
| Philadelphia Athletics |
Philadelphia Phillies
|
| Washington Senators |
Pittsburgh Pirates
|
| White Stockings |
St. Louis Cardinals
|
- Cleveland Blues renamed Cleveland Bronchos.
- Milwaukee Brewers relocate as St. Louis Browns.
- Baltimore Orioles relocate as New York Highlanders.
- Chicago Orphans renamed Chicago Cubs.
- Cleveland Bronchos renamed Cleveland Naps.
- White Stockings renamed Chicago White Sox.
- Washington Senators renamed Washington Nationals.
- Boston Beaneaters renamed Boston Doves.
- Boston Americans renamed Boston Red Sox.
- Boston Doves renamed Boston Rustlers.
- Brooklyn Superbas renamed Brooklyn Dodgers.
- Boston Rustlers renamed Boston Braves.
- Brooklyn Dodgers renamed Brooklyn Superbas.
- New York Highlanders renamed New York Yankees.
- Brooklyn Superbas renamed Brooklyn Robins.
- Cleveland Naps renamed Cleveland Indians.
- Brooklyn Robins renamed Brooklyn Dodgers.
- Boston Braves renamed Boston Bees.
- Boston Bees renamed Boston Braves.
- Boston Braves relocate as Milwaukee Braves.
- Cincinnati Reds renamed Cincinnati Redlegs.
- St. Louis Browns relocate as Baltimore Orioles.
- Philadelphia Athletics relocate as Kansas City Athletics.
- Washington Nationals renamed Washington Senators.
- Brooklyn Dodgers relocate as Los Angeles Dodgers.
- New York Giants relocate as San Francisco Giants.
- Cincinnati Redlegs renamed Cincinnati Reds.
- Los Angeles Angels and a new Washington Senators enfranchised.
- The already existing Washington Senators relocate as Minnesota Twins.
- Houston Colt .45's and New York Mets enfranchised.
- Houston Colt .45's renamed Houston Astros.
- Los Angeles Angels renamed California Angels on September 2.
- Milwaukee Braves relocate as Atlanta Braves.
- Kansas City Athletics relocate as Oakland Athletics.
- American League realigned into Eastern and Western divisions.
- National League realigned into Eastern and Western divisions.
- Kansas City Royals, Montreal Expos, San Diego Padres, and Seattle Mariners enfranchised.
| American League
|
| Eastern Division |
Western Division
|
| Baltimore Orioles |
California Angels
|
| Boston Red Sox |
Chicago White Sox
|
| Cleveland Indians |
Kansas City Royals
|
| Detroit Tigers |
Minnesota Twins
|
| New York Yankees |
Oakland Athletics
|
| Washington Senators |
Seattle Pilots
|
| National League
|
| Eastern Division |
Western Division
|
| Chicago Cubs |
Atlanta Braves
|
| Montreal Expos |
Cincinnati Reds
|
| New York Mets |
Houston Astros
|
| Philadelphia Phillies |
Los Angeles Dodgers
|
| Pittsburgh Pirates |
San Diego Padres
|
| St. Louis Cardinals |
San Francisco Giants
|
- Seattle Pilots relocate as Milwaukee Brewers.
- Milwaukee Brewers moved to Eastern Division.
- Washington Senators relocate as Texas Rangers and moved to Western Division.
- Oakland Athletics renamed Oakland A's.
- Seattle Mariners enfranchised in American League Western Division.
- Toronto Blue Jays enfranchised in American League Eastern Divison.
- Oakland A's renamed Oakland Athletics.
- Colorado Rockies enfranchised in National League Western Division.
- Florida Marlins enfranchised in National League Eastern Division.
- American League realigned into Central, Eastern, and Western divisions.
- National League realigned into Central, Easter, and Western divisions.
| American League
|
| Central Division |
Eastern Division |
Western Division
|
| Chicago White Sox |
Baltimore Orioles |
California Angels
|
| Cleveland Indians |
Boston Red Sox |
Oakland Athletics
|
| Kansas City Royals |
Detroit Tigers |
Seattle Mariners
|
| Milwaukee Brewers |
New York Yankees |
Texas Rangers
|
| Minnesota Twins |
Toronto Blue Jays |
|
| American League
|
| Central Division |
Eastern Division |
Western Division
|
| Chicago Cubs |
Atlanta Braves |
Colorado Rockies
|
| Cincinnati Reds |
Florida Marlins |
Los Angeles Dodgers
|
| Houston Astros |
Montreal Expos |
San Diego Padres
|
| Pittsburgh Pirates |
New York Mets |
San Francisco Giants
|
| St. Louis Cardinals |
Philadelphia Phillies |
|
- California Angels renamed Anaheim Angels.
- Arizona Diamondbacks enfranchised in National League Western Division.
- Detroit Tigers moved to American League Central Division.
- Milwaukee Brewers moved to National League Central Division.
- Tampa Bay Devil Rays enfranchised in American League Eastern Division.
- Anaheim Angels renamed Los Angeles Angels of Anaheim.
- Montreal Expos relocate as Washington Nationals.
- Tampa Bay Devils Rays renamed Tampa Bay Rays.
- Florida Marlins renamed Miami Marlins.
- Houston Astros moved to American League Western Division.
- Major League Soccer founded.
- Aligned into Eastern and Western conferences.
| Eastern Conference |
Western Conference
|
| Columbus Crew |
Colorado Rapids
|
| D.C. United |
Dallas Burn
|
| New England Revolution |
Kansas City Wiz
|
| New York/New Jersey MetroStars |
Los Angeles Galaxy
|
| Tampa Bay Mutiny |
San Jose Clash
|
- Kansas City Wiz renamed Kansas City Wizards.
- Chicago Fire enfranchised in Western Conference.
- Miami Fusion FC enfranchised in Eastern Conference.
- New York/New Jersey MetroStars renamed MetroStars.
- Realigned into Central, Eastern, and Western divisions.
- San Jose Clash renamed San Jose Earthquakes.
| Central Division |
Eastern Division |
Western Division
|
| Chicago Fire |
D.C. United |
Colorado Rapids
|
| Columbus Crew |
MetroStars |
Kansas City Wizards
|
| Dallas Burn |
Miami Fusion FC |
Los Angeles Galaxy
|
| Tampa Bay Mutiny |
New England Revolution |
San Jose Earthquakes
|
- Realigned into Eastern and Western Conferences.
- Miami Fusion FC and Tampa Bay Mutiny fold.
| Eastern Conference |
Western Conference
|
| Chicago Fire |
Colorado Rapids
|
| Columbus Crew |
Dallas Burn
|
| D.C. United |
Kansas City Wizards
|
| MetroStars |
Los Angeles Galaxy
|
| New England Revolution |
San Jose Earthquakes
|
- C.D. Chivas USA and Real Salt Lake enfranchised in Western Conference.
- Dallas Burn renamed FC Dallas
- Kansas City Wizards moved to Eastern Conference.
- Houston Dynamo enfranchised in Western Conference.
- MetroStars renamed New York Red Bulls.
- San Jose Earthquakes suspended.
- Toronto FC enfranchised in Eastern Conference.
- San Jose Earthquakes return from suspension in Western Conference.
- Seattle Sounders FC enfranchised in Western Conference.
- Philadelphia Union enfranchised in Eastern Conference.
- Houston Dynamo moved to Eastern Conference.
- Kansas City Wizards renamed Sporting Kansas City.
- Portland Timbers and Vancouver Whitecaps FC.
- Montreal Impact enfranchised in Eastern Conference.
National Basketball Association
edit
- Basketball Association of America founded.
- Aligned into Eastern and Western divisions.
| Eastern Division |
Western Division
|
| Boston Celtics |
Chicago Stags
|
| New York Knicks |
Cleveland Rebels
|
| Philadelphia Warriors |
Detroit Falcons
|
| Providence Steamrollers |
Pittsburgh Ironmen
|
| Toronto Huskies |
St. Louis Bombers
|
| Washington Capitols |
|
- Baltimore Bullets enfranchised in Western Division.
- Cleveland Rebels, Detroit Falcons, Pittsburgh Ironmen, and Toronto Huskies fold.
- Washington Capitols moved to Western Division.
- Baltimore Bullets and Washington Capitols moved to Eastern Division.
- Fort Wayne Pistons and Rochester Royals moved to Western Division from National Basketball League Eastern Division.
- Indianapolis Jets and Minneapolis Lakers moved to Western Division from National Basketball League Western Division.
- Renamed National Basketball Association.
- Realigned into Central, Eastern, and Western divisions.
- Anderson Packers and Syracuse Nationals moved from National Basketball League Eastern Division.
- Denver Nuggets, Sheboygan Redskins, Tri-Cities Blackhawks, and Waterloo Hawks moved from National Basketball League Western Division.
- Indianapolis Jets fold.
- Indianapolis Olympians enfranchised.
| Central Division |
Eastern Division |
Western Division
|
| Chicago Stags |
Baltimore Bullets |
Anderson Packers
|
| Fort Wayne Pistons |
Boston Celtics |
Denver Nuggets
|
| Minneapolis Lakers |
New York Knicks |
Indianapolis Olympians
|
| Rochester Roya;s |
Philadelphia Warriors |
Sheboygan Red Skins
|
| St. Louis Bombers |
Syracuse Nationals |
Tri-Cities Blackhawks
|
|
Washington Capitols |
Waterloo Hawks
|
- Realigned into Eastern and Western divisions.
- Anderson Packers, Chicago Stags, Denver Nuggets, St. Louis Bombers, Sheboygan Red Skins, and Waterloo Hawks fold.
| Eastern Division |
Western Division
|
| Baltimore Bullets |
Fort Wayne Pistons
|
| Boston Celtics |
Indianapolis Olympians
|
| New York Knicks |
Minneapolis Lakers
|
| Philadelphia Warriors |
Rochester Royals
|
| Syracuse Nationals |
Tri-Cities Blackhawks
|
| Washington Capitols |
|
- Washington Capitols fold on January 9, 1951.
- Tri-Cities Blackhawks relocate as Milwaukee Hawks.
- Indianapolis Olympians fold.
- Baltimore Bullets fold on November 27.
- Milwaukee Hawks relocate as St. Louis Hawks.
- Fort Wayne Pistons relocate as Detroit Pistons.
- Rochester Royals relocate as Cincinnati Royals.
- Minneapolis Lakers relocate as Los Angeles Lakers.
- Chicago Packers enfranchised in Western Division.
- Chicago Packers renamed Chicago Zephyrs.
- Cincinnati Royals moved to Eastern Division.
- Philadelphia Warriors relocate as San Francisco Warriors and moved to Western Division.
- Chicago Zephyrs relocate as Baltimore Bullets.
- Syracuse Nationals relocate as Philadelphia 76ers.
- Baltimore Bullets moved to Eastern Division.
- Chicago Bulls enfranchised in Western Division.
- Detroit Pistons moved to Eastern Division.
- San Diego Rockets and Seattle SuperSonics enfranchised in Western Division.
- Milwaukee Bucks enfranchised in Western Division.
- Phoenix Suns enfranchised in Eastern Division.
- St. Louis Hawks relocate as Atlanta Hawks.
- Realigned into Eastern and Western conference.
- Eastern Conference aligned into Atlantic and Central divisions.
- Western Conference aligned into Midwestern and Pacific divisions.
- Buffalo Braves, Cleveland Cavaliers, and Portland Trail Blazers enfranchised.
| Eastern Conference
|
| Atlantic Division |
Central Division
|
| Boston Celtics |
Atlanta Hawks
|
| Buffalo Braves |
Baltimore Bullets
|
| New York Knicks |
Cincinnati Royals
|
| Philadelphia 76ers |
Cleveland Cavaliers
|
| Western Conference
|
| Midwestern Division |
Pacific Division
|
| Chicago Bulls |
Los Angeles Lakers
|
| Detroit Pistons |
Portland Trail Blazers
|
| Milwaukee Bucks |
San Diego Rockets
|
| Phoenix Suns |
San Francisco Warriors
|
|
Seattle SuperSonics
|
- San Diego Rockets relocate as Houston Rockets.
- San Francisco Warriors relocate as Golden State Warriors.
- Cincinnati Royals relocate as Kansas City-Omaha Kings and moved to Midwestern Division.
- Houston Rockets moved to Central Division.
- Phoenix Suns moved to Pacific Division.
- Baltimore Bullets relocate as Capital Bullets.
- Capital Bullets renamed Washington Bullets.
- New Orleans Jazz enfranchised in Central Division.
- Kansas City-Omaha Kings relocate as Kansas City Kings.
- Denver Nuggets and Indiana Pacers moved to Midwestern Division from American Basketball Association.
- New York Nets moved to Atlantic Division from American Basketball Association.
- San Antonio Spurs moved to Central Division from American Basketball Association.
- New York Nets relocate as New Jersey Nets.
- Buffalo Braves relocate as San Diego Clippers and moved to Pacific Division.
- Detroit Pistons moved to Central Division.
- Washington Bullets moved to Atlantic Division.
- Indiana Pacers moved to Central Division.
- New Orleans Jazz relocate as Utah Jazz and moved to Midwestern Division.
- Chicago Bulls and Milwaukee Bucks moved to Central Division.
- Dallas Mavericks enfranchised in Midwestern Division.
- Houston Rockets and San Antonio Spurs moved to Midwestern Division.
- San Diego Clippers relocate as Los Angeles Clippers.
- Kansas City Kings relocate as Sacramento Kings.
- Charlotte Hornets enfranchised in Atlantic Division.
- Miami Heat enfranchised in Midwestern Division.
- Sacramento Kings moved to Pacific Division.
- Charlotte Hornets moved to Midwestern Division.
- Miami Heat moved to Atlantic Division.
- Minnesota Timberwolves enfranchised in Midwestern Division.
- Orlando Magic enfranchised in Central Division.
- Charlotte Hornets moved to Central Division.
- Orlando Magic moved to Atlantic Division.
- Orlando Magic moved to Atlantic Division.
- Toronto Raptors enfranchised in Central Division.
- Vancouver Grizzlies enfranchised in Midwestern Division.
- Washington Bullets renamed Washington Wizards.
- Vancouver Grizzlies relocate as Memphis Grizzlies.
- Charlotte Hornets relocate as New Orleans Hornets.
- Eastern Conference realigned into Atlantic, Central, and Southeastern Divisions.
- Western Conference realigned into Northwestern, Pacific, and Southwestern Divisions.
- Charlotte Bobcats enfranchised.
| Eastern Conference
|
| Atlantic Division |
Central Division |
Southeastern Division
|
| Boston Celtics |
Chicago Bulls |
Atlanta Hawks
|
| New Jersey Nets |
Cleveland Cavaliers |
Charlotte Bobcats
|
| New York Knicks |
Detroit Pistons |
Miami Heat
|
| Philadelphia 76ers |
Indiana Pacers |
Orlando Magic
|
| Toronto Raptors |
Milwaukee Bucks |
Washington Wizards
|
| Western Conference
|
| Northwestern Division |
Pacific Division |
Southwestern Division
|
| Denver Nuggets |
Golden State Warriors |
Dallas Mavericks
|
| Minnesota Timberwolves |
Los Angeles Clippers |
Houston Rockets
|
| Portland Trail Blazers |
Los Angeles Lakers |
Memphis Grizzlies
|
| Seattle SuperSonics |
Phoenix Suns |
New Orleans Hornets
|
| Utah Jazz |
Sacramento Kings |
San Antonio Spurs
|
- New Orleans Hornets relocate as New Orleans/Oklahoma City Hornets.
- New Orleans/Oklahoma City Hornets relocate as New Orleans Hornets.
- Seattle SuperSonics relocate as Oklahoma City Thunder.
- New Jersey Nets relocate as Brooklyn Nets.
- Golden State Warriors relocate as San Francisco Warriors.
- American Professional Football Association founded.
- Aligned into single table.
| Akron Pros
|
| Buffalo All-Americans
|
| Canton Bulldogs
|
| Chicago Cardinals
|
| Chicago Tigers
|
| Columbus Panhandles
|
| Dayton Triangles
|
| Decatur Staleys
|
| Detroit Heralds
|
| Hammond Pros
|
| Muncie Flyers
|
| Rochester Jeffersons
|
| Rock Island Independents
|
- Chicago Tigers fold.
- Cleveland Tigers renamed Cleveland Indians.
- Decatur Staleys relocate as Chicago Staleys.
- Detroit Heralds renamed Detroit Tigers.
- Cincinnati Celts, Evansville Crimson Giants, Green Bay Packers, Louisville Brecks, Minneapolis Marines, New York Brickley Giants, Tonawanda Kardex, and Washington Senators enfranchised.
- Detroit Tigers fold on November 13.
- Renamed National Football League.
- Chicago Staleys renamed Chicago Bears.
- Cincinnati Celts, Cleveland Indians, Detroit Heralds, Muncie Flyers, New York Brickley Giants, Tonawanda Kardex, and Washington Senators fold.
- Milwaukee Badgers, Oorang Indians, Racine Legion, and Toledo Maroons enfranchised.
- Cleveland Indians, Duluth Kelleys, and St. Louis All Stars enfranchised.
- Evansville Crimson Giants fold.
- Buffalo All-Americans renamed Buffalo Bisons.
- Canton Bulldogs relocate Cleveland Bulldogs.
- Cleveland Indians, Louisville Brecks, Oorang Indians, St. Louis All Stars, and Toledo Maroons fold.
- Frankford Yellow Jackets, Kansas City Blues, and Kenosha Maroons enfranchised.
- Canton Bulldogs, Detroit Panthers, New York Giants, Pottsville Maroons, and Providence Steam Roller enfranchised.
- Kansas City Blues renamed Kansas City Cowboys.
- Kenosha Maroons, Minneapolis Marines, and Racine Legion fold.
- Pottsville Maroons suspended in December.
- Akron Pros renamed Akron Indians.
- Brooklyn Lions, Hartford Blues, Los Angeles Buccaneers, Louisville Colonels, and Racine Tornadoes enfranchised.
- Buffalo Bisons renamed Buffalo Rangers.
- Cleveland Bulldogs, Rochester Jeffersons, and Rock Island Independents fold.
- Duluth Kelleys renamed Duluth Eskimos.
- Pottsville Maroons return from suspension.
- Brooklyn Lions renamed Brooklyn Horsemen on November 21.
- Akron Indians, Canton Bulldogs, Columbus Tigers, Detroit Panthers, Hammond Pros, Hartford Blues, Kansas City Cowboys, Los Angeles Buccaneers, Louisville Colonels, Milwaukee Badgers, and Racine Tornadoes fold.
- Brooklyn Horsemen renamed New York Yankees.
- Buffalo Rangers renamed Buffalo Bisons.
- Cleveland Bulldogs enfranchised.
- Buffalo Bisons, Cleveland Bulldogs, and Duluth Eskimos fold.
- Detroit Wolverines enfranchised.
- Buffalo Bisons, Minneapolis Red Jackets, Orange Tornadoes, and Staten Island Stapletons enfranchised.
- Detroit Wolverines and New York Yankees fold.
- Pottsville Maroons relocate as Boston Bulldogs.
- Boston Bulldogs and Buffalo Bisons fold.
- Dayton Triangles relocate as Brooklyn Dodgers.
- Orange Tornadoes relocate as Newark Tornadoes.
- Portsmouth Spartans enfranchised.
- Cleveland Indians enfranchised.
- Minneapolis Red Jackets and Newark Tornadoes fold.
- Frankford Yellow Jackets fold on October 26.
- Boston Braves enfranchised.
- Cleveland Indians and Providence Steam Roller fold.
- Realigned into Eastern and Western divisions.
- Boston Braves renamed Boston Redskins.
- Cincinnati Reds, Philadelphia Eagles, and Pittsburgh Pirates enfranchised.
- Staten Island Stapletons fold.
| Eastern Division |
Western Division
|
| Boston Redskins |
Chicago Bears
|
| Brooklyn Dodgers |
Chicago Cardinals
|
| New York Giants |
Cincinnati Reds
|
| Philadelphia Eagles |
Green Bay Packers
|
| Pittsburgh Pirates |
Portsmouth Spartans
|
- Portsmouth Spartans relocate as Detroit Lions.
- Cincinnati Reds fold on November 6.
- St. Louis Gunners enfranchised in Western Division on November 6.
- Boston Redskins relocate as Washington Redskins.
- Cleveland Rams enfranchised in Western Division.
- Pittsburgh Pirates renamed Pittsburgh Steelers.
- Cleveland Rams suspended.
- Philadelphia Eagles and Pittsburgh Steelers temporarily merge as Phil-Pitt Combine.
- Brooklyn Dodgers renamed Brooklyn Tigers.
- Phil-Pitt Combine dissolves into Philadelphia Eagles in Eastern Division, and Pittsburgh Steelers.
- Chicago Cardinals and Pittsburgh Steelers temporarily merge as Card-Pitt Combine in Western Division.
- Cleveland Rams return from suspension in Western Division.
- Boston Yanks and Brooklyn Tigers temporarily merge as Boston Yanks.
- Card-Pitt Combine dissolves into Chicago Cardinals in Western Division, and Pittsburgh Steelers in Eastern Division.
- Boston Yanks dissolve into Boston Yanks in Eastern Division, and Brooklyn Tigers.
- Brooklyn Tigers fold.
- Cleveland Rams relocate as Los Angeles Rams.
- Boston Yanks fold.
- New York Bulldogs enfranchised in Eastern Division.
- Realigned into American and National conferences.
- Baltimore Colts, Cleveland Browns, and San Francisco 49ers moved from All-America Football Conference.
- New York Bulldogs renamed New York Yanks.
| American Conference |
National Conference
|
| Chicago Cardinals |
Baltimore Colts
|
| Cleveland Browns |
Chicago Bears
|
| New York Giants |
Detroit Lions
|
| Philadelphia Eagles |
Green Bay Packers
|
| Pittsburgh Steelers |
Los Angeles Rams
|
| Washington Redskins |
New York Yanks
|
|
San Francisco 49ers
|
- Dallas Texans enfranchised in National Conference.
- New York Yanks fold.
- Realigned into Eastern and Western conferences.
- Baltimore Colts enfranchised.
- Dallas Texans fold.
| Eastern Conference |
Western Conference
|
| Chicago Cardinals |
Baltimore Colts
|
| Cleveland Browns |
Chicago Bears
|
| New York Giants |
Detroit Lions
|
| Philadelphia Eagles |
Green Bay Packers
|
| Pittsburgh Steelers |
Los Angeles Rams
|
| Washington Redskins |
San Francisco 49ers
|
- Chicago Cardinals relocate as St. Louis Cardinals.
- Dallas Cowboys enfranchised in Western Conference.
- Dallas Cowboys moved to Eastern Conference.
- Minnesota Vikings enfranchised in Western Conference.
- Atlanta Falcons enfranchised in Eastern Conference.
- Eastern Conference realigned into Capitol and Century divisions.
- Western Conference realigned into Central and Coastal divisions.
- New Orleans Saints enfranchised.
| Eastern Conference
|
| Capitol Division |
Century Division
|
| Dallas Cowboys |
Cleveland Browns
|
| New Orleans Saints |
New York Giants
|
| Philadelphia Eagles |
Pittsburgh Steelers
|
| Washington Redskins |
St. Louis Cardinals
|
| Western Conference
|
| Central Division |
Coastal Division
|
| Chicago Bears |
Atlanta Falcons
|
| Detroit Lions |
Baltimore Colts
|
| Green Bay Packers |
Los Angeles Rams
|
| Minnesota Vikings |
San Francisco 49ers
|
- New Orleans Saints moved to Century Division.
- New York Giants moved to Capitol Division.
- New Orleans Sainst moved to Capitol Division.
- New York Giants moved to Century Division.
- Realigned into American Football and National Football conferences.
- American Football Conference aligned into Central, Eastern, and Western divisions.
- National Football Conference aligned into Central, Eastern, and Western divisions.
- Boston Patriots, Buffalo Bills, Houston Oilers, Miami Dolphins, and New York Jets moved from American Football League Eastern Division.
- Cincinnati Bengals, Denver Broncos, Kansas City Chiefs, Oakland Raiders, and San Diego Padres moved from American Football League Western Division.
| American Football Conference
|
| Central Division |
Eastern Division |
Western Division
|
| Cincinnati Bengals |
Baltimore Colts |
Denver Broncos
|
| Cleveland Browns |
Boston Patriots |
Kansas City Chiefs
|
| Houston Oilers |
Buffalo Bills |
Oakland Raiders
|
| Pittsburgh Steelers |
Miami Dolphins |
San Diego Chargers
|
|
New York Jets |
|
| National Football Conference
|
| Central Division |
Eastern Division |
Western Division
|
| Chicago Bears |
Dallas Cowboys |
Atlanta Falcons
|
| Detroit Lions |
New York Giants |
Los Angeles Rams
|
| Green Bay Packers |
Philadelphia Eagles |
New Orleans Saints
|
| Minnesota Vikings |
St. Louis Cardinals |
San Francisco 49ers
|
|
Washington Redskins |
|
- Boston Patriots renamed New England Patriots.
- Seattle Seahawks enfranchised in National Football Conference Western Division.
- Tampa Bay Buccaneers enfranchised in American Football Conference Western Division.
- Seattle Seahawks moved to American Football Conference Western Division.
- Tampa Bay Buccaneers moved to National Football Conference Central Division.
- Oakland Raiders relocate as Los Angeles Raiders.
- Baltimore Colts relocate as Indianapolis Colts.
- St. Louis Cardinals relocate as Phoenix Cardinals.
- Phoenix Cardinals renamed Arizona Cardinals.
- Carolina Panthers enfranchised in National Football Conference Western Division.
- Jacksonville Jaguars enfranchised in American Football Conference Central Division.
- Los Angeles Raiders relocate as Oakland Raiders.
- Los Angeles Rams relocate as St. Louis Rams.
- Baltimore Ravens enfranchised in American Football Conference Central Division.
- Cleveland Browns suspended.
- Houston Oilers relocate as Tennessee Oilers.
- Cleveland Browns return from suspension in American Football Conference Central Division.
- Tennessee Oilers renamed Tennessee Titans.
- American Football Conference realigned into Eastern, Northern, Southern, and Western divisions.
- National Football Conference realigned into Eastern, Northern, Southern, and Western divisions.
- Houston Texans enfranchised.
| American Football Conference
|
| Eastern Division |
Northern Division |
Southern Division |
Western Division
|
| Buffalo Bills |
Baltimore Ravens |
Houston Texans |
Denver Broncos
|
| Miami Dolphins |
Cincinnati Bengals |
Indinapolis Colts |
Kansas City Chiefs
|
| New England Patriots |
Cleveland Browns |
Jacksonville Jaguars |
Oakland Raiders
|
| New York Jets |
Pittsburgh Steelers |
Tennessee Titans |
San Diego Chargers
|
| National Football Conference
|
| Eastern Division |
Northern Division |
Southern Division |
Western Division
|
| Dallas Cowboys |
Chicago Bears |
Atlanta Falcons |
Arizona Cardinals
|
| New York Giants |
Detroit Lions |
Carolina Panthers |
St. Louis Rams
|
| Philadelphia Eagles |
Green Bay Packers |
New Orleans Saints |
San Francisco 49ers
|
| Washington Redskins |
Minnesota Vikings |
Tampa Bay Buccaneers |
Seattle Seahawks
|
National Hockey League
edit
- National Hockey League founded.
- Aligned into single table.
| Montreal Canadiens
|
| Montreal Wanderers
|
| Ottawa Senators
|
| Toronto Hockey Club
|
Montreal Wanderers fold on January 2, 1918.
- Toronto Hockey Club renamed Toronto Arenas.
- Quebec Athletics enfranchised.
- Toronto Arenas renamed Toronto St. Patricks.
- Quebec Athletics relocate as Hamilton Tigers.
- Boston Bruins and Montreal Maroons enfranchised.
- Hamilton Tigers fold.
- New York Americans and Pittsburgh Pirates fold.
- Realigned into American and Canadian divisions.
- Chicago Black Hawks, Detroit Cougars, and New York Americans enfranchised.
| American Division |
Canadian Division
|
| Boston Bruins |
Montreal Canadiens
|
| Chicago Black Hawks |
Montreal Maroons
|
| Detroit Cougars |
New York Americans
|
| New York Rangers |
Ottawa Senators
|
| Pittsburgh Pirates |
Toronto St. Patricks
|
- Toronto St. Patricks renamed Toronto Maple Leafs.
- Detroit Cougars renamed Detroit Falcons.
- Pittsburgh Pirates relocate as Philadelphia Quakers.
- Ottawa Senators suspended.
- Philadelphia Quakers fold.
- Detroit Falcons renamed Detroit Red Wings.
- Ottawa Senators return from suspension in Canadian Division.
- Ottawa Senators relocate as St. Louis Eagles.
- Realigned into single table.
- Montreal Maroons fold.
| Boston Bruins
|
| Chicago Black Hawks
|
| Detroit Red Wings
|
| Montreal Canadiens
|
| New York Americans
|
| New York Rangers
|
| Toronto Maple Leafs
|
- New York Americans renamed Brooklyn Americans.
- Realigned into Eastern and Western divisions.
- Los Angeles Kings, Minnesota North Stars, California Seals, Philadelphia Flyers, Pittsburgh Penguins, and St. Louis Blues enfranchised.
| Eastern Division |
Western Division
|
| Boston Bruins |
California Seals
|
| Chicago Black Hawks |
Los Angeles Kings
|
| Detroit Red Wings |
Minnesota North Stars
|
| Montreal Canadiens |
Philadelphia Flyers
|
| New York Rangers |
Pittsburgh Penguins
|
| Toronto Maple Leafs |
St. Louis Blues
|
- California Seals renamed Oakland Seals on November 6.
- Buffalo Sabres and Vancouver Canucks enfranchised in Eastern Division.
- Chicago Black Hawks moved to Western Division.
- Oakland Seals renamed California Golden Seals.
- Atlanta Flames enfranchised in Western Division.
- New York Islanders enfranchised in Eastern Division.
- Realigned into Clarence Campbell and Prince of Wales conferences.
- Clarence Campbell Conference aligned into Patrick and Smythe divisions.
- Prince of Wales Conference aligned into Adams and Norris divisions.
- Kansas City Scouts and Washington Capitals enfranchised.
| Clarence Campbell Conference
|
| Patrick Division |
Smythe Division
|
| Atlanta Flames |
Chicago Black Hawks
|
| New York Islanders |
Kansas City Scouts
|
| New York Rangers |
Minnesota North Stars
|
| Philadelphia Flyers |
St. Louis Blues
|
|
Vancouver Canucks
|
| Prince of Wales Conference
|
| Adams Division |
Norris Division
|
| Boston Bruins |
Detroit Red Wings
|
| Buffalo Sabres |
Los Angeles Kings
|
| California Golden Seals |
Montreal Canadiens
|
| Toronto Maple Leafs |
Pittsburgh Penguins
|
|
Washington Capitals
|
- California Golden Seals relocate as Cleveland Barons.
- Kansas City Scouts relocate as Colorado Rockies.
- Cleveland Barons and Minnesota North Stars merge as Minnesota North Stars in Adams Division.
- Edmonton Oilers and Winnipeg Jets moved to Smythe Division from World Hockey Association.
- Hartford Whalers moved to Norris Division from World Hockey Association.
- Quebec Nordiques moved to Adams Division from World Hockey Association.
- Washington Capitals moved to Patrick Division.
- Atlanta Flames relocate as Calgary Flames.
- Clarence Campbell Conference realigned into Norris and Smythe divisions.
- Prince of Wales Conference realigned into Adams and Patrick divisions.
| Clarence Campbell Conference
|
| Norris Division |
Smythe Division
|
| Chicago Black Hawks |
Calgary Flames
|
| Detroit Red Wings |
Colorado Rockies
|
| Minnesota North Stars |
Edmonton Oilers
|
| St. Louis Blues |
Los Angeles Kings
|
| Toronto Maple Leafs |
Vancouver Canucks
|
| Winnipeg Jets |
|
| Prince of Wales Conference
|
| Adams Division |
Patrick Division
|
| Boston Bruins |
New York Islanders
|
| Buffalo Sabres |
New York Rangers
|
| Hartford Whalers |
Philadelphia Flyers
|
| Montreal Canadiens |
Pittsburgh Penguins
|
| Quebec Nordiques |
Washington Capitals
|
- Colorado Rockies relocate as New Jersey Devils and moved to Patrick Division.
- Winnipeg Jets moved to Smythe Division.
- Chicago Black Hawks renamed Chicago Blackhawks.
- San Jose Sharks enfranchised in Smythe Division.
- Ottawa Senators enfranchised in Adams Division.
- Tampa Bay Lightning enfranchised in Norris Division.
- Realigned into Eastern and Western conferences.
- Eastern Conference aligned into Atlantic and Northeastern divisions.
- Western Conference aligned into Central and Pacific divisions.
- Florida Panthers and Mighty Ducks on Anaheim enfranchised.
- Minnesota North Stars relocate as Dallas Stars.
| Eastern Conference
|
| Atlantic Division |
Northeastern Division
|
| Florida Panthers |
Boston Bruins
|
| New Jersey Devils |
Buffalo Sabres
|
| New York Islanders |
Hartford Whalers
|
| New York Rangers |
Montreal Canadiens
|
| Philadelphia Flyers |
Ottawa Senators
|
| Tampa Bay Lightning |
Pittsburgh Penguins
|
| Washington Capitals |
Quebec Nordiques
|
| Western Conference
|
| Central Division |
Pacific Division
|
| Chicago Blackhawks |
Calgary Flames
|
| Dallas Stars |
Edmonton Oilers
|
| Detroit Red Wings |
Los Angeles Kings
|
| St. Louis Blues |
Mighty Ducks of Anaheim
|
| Toronto Maple Leafs |
San Jose Sharks
|
| Winnipeg Jets |
Vancouver Canucks
|
- Quebec Nordiques relocate as Colorado Avalanche and moved to Pacific Division.
- Winnipeg Jets relocate as Phoenix Coyotes.
- Hartford Whalers relocate as Carolina Hurricanes.
- Eastern Conference realigned into Atlantic, Northeastern, and Southeastern divisions.
- Western Conference realigned into Central, Northwestern, and Pacific divisions.
- Nashville Predators enfranchised.
| Eastern Conference
|
| Atlantic Division |
Northeastern Division |
Southeastern Division
|
| New Jersey Devils |
Boston Bruins |
Carolina Hurricanes
|
| New York Islanders |
Buffalo Sabres |
Florida Panthers
|
| New York Rangers |
Montreal Canadiens |
Tampa Bay Lightning
|
| Philadelphia Flyers |
Ottawa Senators |
Washington Capitals
|
| Pittsburgh Penguins |
Tampa Bay Lightning |
|
| Western Conference
|
| Central Division |
Northwestern Division |
Pacific Division
|
| Chicago Blackhawks |
Calgary Flames |
Dallas Stars
|
| Detroit Red Wings |
Colorado Avalanche |
Los Angeles Kings
|
| Nashville Predators |
Edmonton Oilers |
Mighty Ducks of Anaheim
|
| St. Louis Blues |
Vancouver Canucks |
Phoenix Coyotes
|
|
|
San Jose Sharks
|
- Atlanta Thrashers enfranchised in Southeastern Division.
- Columbus Blue Jackets enfranchised in Central Division.
- Minnesota Wild enfranchised in Northwestern Division
- Returned from suspension.
- Mighty Ducks of Anaheim renamed Anaheim Ducks.
- Atlanta Thrashers relocate as Winnipeg Jets.
- Founded.
- Aligned into Atlantic, Central, and Pacific divisions.
| Atlantic Division |
Central Division |
Pacific Division
|
| Boston Breakers |
Birmingham Stallions |
Arizona Wranglers
|
| New Jersey Generals |
Chicago Blitz |
Denver Gold
|
| Philadelphia Stars |
Michigan Panthers |
Los Angeles Express
|
| Washington Federals |
Tampa Bay Bandits |
Oakland Invaders
|
- Realigned into Eastern and Western conferences.
- Eastern Conference aligned into Atlantic and Southern divisions.
- Western Conference aligned into Central and Pacific divisions.
- Arizona Wranglers relocate as Chicago Blitz.
- Boston Breakers relocate as New Orleans Breakers.
- Chicago Blitz relocate as Arizona Wranglers.
- Houston Gamblers, Jacksonville Bulls, Memphis Showboats, Oklahoma Outlaws, Pittsburgh Maulers, and San Antonio Gunslingers enfranchised.
| Eastern Conference
|
| Atlantic Division |
Southern Division
|
| New Jersey Generals |
Birmingham Stallions
|
| Philadelphia Stars |
Jacksonville Bulls
|
| Pittsburgh Maulers |
Memphis Showboats
|
| Washington Federals |
New Orleans Breakers
|
|
Tampa Bay Bandits
|
| Western Conference
|
| Central Division |
Pacific Division
|
| Chicago Blitz |
Arizona Wranglers
|
| Houston Gamblers |
Denver Gold
|
| Michigan Panthers |
Los Angeles Express
|
| Oklahoma Outlaws |
Oakland Invaders
|
|
San Antonio Gunslingers
|
- Eastern Conference realigned into single table.
- Western Conference realigned into single table.
- Arizona Wranglers and Oklahoma Outlaws merge into Arizona Outlaws.
- Michigan Panthers and Oakland Invaders merge into Oakland Invaders.
- New Orleans Breakers relocate as Portland Breakers.
- Philadelphia Stars relocate as Baltimore Stars.
- Chicago Blitz and Pittsburgh Maulers fold.
- Washington Federals relocate as Orlando Renegades.
| Eastern Conference |
Western Conference
|
| Baltimore Stars |
Arizona Outlaws
|
| Birmingham Stallions |
Denver Gold
|
| Jacksonville Bulls |
Houston Gamblers
|
| Memphis Showboats |
Los Angeles Express
|
| New Jersey Generals |
Oakland Invaders
|
| Orlando Renegades |
Portland Breakers
|
| San Antonio Gunslingers |
Tampa Bay Bandits
|
- World Football League founded.
- Aligned into Central, Eastern, and Western divisions.
| Central Division |
Eastern Division |
Western Division
|
| Birmingham Americans |
Florida Blazers |
Houston Texans
|
| Chicago Fire |
Jacksonville Sharks |
Portland Storm
|
| Detroit Wheels |
New York Stars |
Southern California Sun
|
| Memphis Southmen |
Philadelphia Bell |
The Hawaiians
|
- Houston Texans relocate as Shreveport on September 18.
- Shreveport renamed Shreveport Steamer on September 23.
- New York Stars relocate as Charlotte Stars on September 25.
- Charlotee Stars renamed Charlotte Hornets on October 4.
- Detroit Wheels and Jacksonvilee Sharks fold on October 7.
- Realigned into Eastern and Western divisions.
- Birmingham Americans renamed Birmingham Vulcans.
- Chicago Fire renamed Chicago Winds.
- Florida Blazers relocate as San Antonio Wings.
- Jacksonville Express enfranchised.
- Memphis Southmen renamed Memphis Grizzlies.
- Portland Storm renamed Portland Thunder.
| Eastern Division |
Western Division
|
| Birmingham Vulcans |
Chicago Winds
|
| Charlotte Hornets |
Portland Thunder
|
| Jacksonville Express |
San Antonio Wings
|
| Memphis Southmen |
Shreveport Steamer
|
| Philadelphia Bell |
Southern California Sun
|
|
The Hawaiians
|
- XFL Founded.
- Aligned into Eastern and Western divisions.
| Eastern Division |
Western Division
|
| Birmingham Thunderbolts |
Las Vegas Outlaws
|
| Chicago Enforcers |
Los Angeles Xtreme
|
| New York/New Jersey Hitmen |
Memphis Maniax
|
| Orlando Rage |
San Francisco Demons
|
