- The following is a list of players and who appeared in at least one game for the Washington Senators franchise of Major League Baseball, which played as the Washington Statesmen in the American Association in 1891 and as the Senators in the National League from 1892 until 1899. Players in bold are in the Baseball Hall of Fame.
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edit- Harry Mace
- Bill Magee
- Dan Mahoney
- John Malarkey
- Al Maul
- Al McCauley
- Bill McCauley
- Pat McCauley
- Dan McFarlan
- Dan McGann
- Deacon McGuire
- Bob McHale
- Doc McJames
- Tom McLaughlin
- Frank McManus
- Mart McQuaid
- Mox McQuery
- Jouett Meekin
- Win Mercer
- Bob Miller
- Kohly Miller
- Jocko Milligan
- Kid Mohler
- Carlton Molesworth
- Joe Mulvey
- Larry Murphy
- Miah Murray
- Bert Myers
N
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edit- Frank Scheibeck
- Kip Selbach
- Dan Shannon
- Frank Shannon
- Jimmy Slagle
- Mike Slattery
- Will Smalley
- Harvey Smith
- Jud Smith
- Pop Smith
- Pop Snyder
- General Stafford
- Joe Stanley
- Ben Stephens
- Otis Stocksdale
- Cub Stricker
- Willie Sudhoff
- Joe Sugden
- Joe Sullivan
- Marty Sullivan
- Mike Sullivan
- Sy Sutcliffe
- Jack Suthoff
- Cy Swaim