1873 Boston Red Stockings season

The 1873 Boston Red Stockings season was the third season of the franchise. They won their second consecutive National Association championship.

Managed by Harry Wright, Boston finished with a record of 43–16 to win the pennant by 4 games. Pitcher Al Spalding started 54 of the Red Stockings' games and led the NA with 41 wins. Second baseman Ross Barnes won the league batting title with a .431 batting average, and catcher Deacon White topped the circuit with 77 runs batted in.

Harry Wright, Al Spalding, first baseman Jim O'Rourke, and shortstop George Wright have all been elected into the Baseball Hall of Fame.

Starters by position
''Note: Pos = Position; G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in''

Other batters
''Note: G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in''

Starting pitchers
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts

Relief pitchers
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts