The 1891 Philadelphia Athletics season was a season in American baseball. The team, which had played the 1890 season in the defunct Players' League, joined the American Association as a replacement for the previous version of the Philadelphia Athletics, which was expelled after the 1890 season. The team finished with a 73–66 record and was fifth place in the AA. The league folded after the 1891 season; the team disbanded with it.

Regular season

Season standings

Record vs. opponents

Opening Day lineup

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