1903 Boston Beaneaters season

The 1903 Boston Beaneaters season was the 33rd season of the franchise. The team finished sixth in the National League with a record of 58–80, 32 games behind the Pittsburgh Pirates.

Notable transactions

 * July 23, 1903: Pop Williams was signed as a free agent by the Beaneaters.

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; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts