Boston Red Stockings pitcher Al Spalding has a record of 38-8 in 404.2 innings pitched and leads the NA in wins. He has a 1.85 earned run average and a 196 ERA+. At the plate, Spalding has a batting average of .354 and an OPS+ of 144.
Boston Red Stockings second baseman Ross Barnes, in 45 games played, leads the NA with 99 hits, a .430 batting average, a 1.034 OPS, and a 211 OPS+. He has 81 runs scored and 44 runs batted in.
July 9 – Eckford of Brooklyn commit 13 errors in their 15–3 loss to Union of Troy. It is the fewest errors committed by the 0–11 Eckfords in a game thus far this season.
July 23 – Despite a winning record, the Union Club of Troy disbands due to financial problems. Half of the "Haymakers'" roster will move to Eckford of Brooklyn, which saves them from dropping out of the NA.
July 26 – In an emergency meeting, the NA revises their scheduling requirements from 5 to 9 games versus each opponent competing for the championship. This is in response to the number of teams that have disbanded and comes 3 days after the first-division Union of Troy had called it quits.
September 1 – Al Thake, left-fielder batting .295 for Atlantic, drowns in New York harbor after falling from a fishing boat. Thake is the first active major league ballplayer to die. (But Elmer White, active in 1871, had died in winter.)