The following lists the events of the 1921 Philadelphia Phillies season.

Offseason

In 1921, the Phillies held spring training in Gainesville, Florida at Fleming Field, the home field of the Florida Gators baseball team.

Regular season

Mid-season arrests

On July 16, 1921, Phillies players Jimmy Smith, Cy Williams, Frank Bruggy, Goldie Rapp, and Cliff Lee were arrested while leaving the ballpark in Philadelphia. Smith was detained and charged with assault, however the other four were allowed to leave after talking to police. While driving away from the park, two pedestrians walked in front of Bruggy's car (which all the Phillies were riding in), and the Phillies allegedly yelled at the pair. This allegedly instigated an argument and Smith was charged with hitting one of the pedestrians several times.

Season standings

Record vs. opponents

Roster

Player stats

Batting

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''

Pitching

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