1917 St. Louis Cardinals season

The 1917 St. Louis Cardinals season was the team's 36th season in St. Louis, Missouri and the 26th season in the National League. The Cardinals went 82–70 during the season and finished third in the National League.

Regular season
Rogers Hornsby began to establish himself as an elite hitter. Hornsby had a .327 batting average which was second in the league. He led the league in triples (17), total bases (253), and slugging percentage (.484).

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