The 1873 Boston Red Stockings season was the 3rd 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.