1921 Pittsburgh Pirates season

The 1921 Pittsburgh Pirates season was the 40th season of the Pittsburgh Pirates franchise; the 35th in the National League. The Pirates finished second in the league standings with a record of 90–63. It would be the first that games would be aired on radio via the then new station KDKA-AM to listeners all over Pittsburgh, making that team the first in MLB to employ radio broadcasters for game broadcasts on the then new medium.

Game log

 * Legend:      = Win       = Loss       = Tie Bold = Pirates team member
 * Legend:      = Win       = Loss       = Tie Bold = Pirates team member

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

Other 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