Boston Red Stockings pitcher Al Spalding has a record of 52-16, leading the NA with 52 wins and 617.1 innings pitched. He has a 1.92 earned run average and a 111 ERA+.
Chicago White Stockings second baseman Levi Meyerle leads the NA with a .394 batting average, a .889 OPS, and a 183 OPS+. He has 65 runs scored and 45 runs batted in
January 29 – Albert Spalding arrives in England to set up a tour for the Boston and Athletic Clubs to demonstrate American baseball to the English.
May 5 – Tommy Bond makes his professional debut, throwing a 4-hitter and defeating Lord Baltimore.
May 6 – Dick McBride of Athletic throws a 1-hitter in a win against crosstown rival Philadelphia.
May 13 – The Chicago Club plays the first professional game in Chicago by a Chicago team since the Great Chicago Fire of 1871. The "White Stockings" win 4-0 over Athletic before 4,000 fans.
June 18 – Playing without suspended pitcher George Zettlein, the Chicagos are humiliated by Mutual 38-1. The Mutuals collect 33 hits, but are outdone by Chicago defensive miscues as they commit 36 errors in the game.
July 10 – Jimmy Wood, player-manager for several teams in the NA, has his right leg amputated above the knee due to infection. Wood would be re-hired by Chicago to replace Fergy Malone and be on the bench managing 5 weeks after the amputation.
July 16 – The Boston and Athletic Clubs depart from Philadelphia for England for their baseball exhibition tour.
September 9 – John Radcliff is dismissed from the Philadelphia Club after umpire William McLean testified that Radcliff had offered him $175 to fix a game.
September 9 – Boston and Athletic return from their England trip, arriving in New York.
October 20 – The Boston Base Ball Club win their 3rd consecutive pennant with a 14-7 victory over Athletic of Philadelphia.