1931 Brooklyn Robins season

The 1931 Brooklyn Robins finished in fourth place, after which longtime manager Wilbert Robinson announced his retirement with 1,399 career victories.

Offseason

 * October 14, 1930: Clise Dudley, Jumbo Elliott, Hal Lee and cash were traded by the Robins to the Philadelphia Phillies for Lefty O'Doul and Fresco Thompson.

Regular season
Jack Quinn became the oldest person in baseball history to pitch on Opening Day. He was 47 when he started for Brooklyn on Opening Day in 1931. It would be Quinn's only start of the season, as he pitched the rest of the year in relief.

Notable transactions

 * May 7, 1931: Harvey Hendrick was traded by the Robins to the Cincinnati Reds for Mickey Heath.
 * May 23, 1931: Ray Moss was purchased from the Robins by the Boston Braves.

Starters by position
''Note: Pos = Position; G = Games played; AB = At bats; R = Runs; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in; SB = Stolen bases''

Other batters
''Note: G = Games played; AB = At bats; R = Runs; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in; SB = Stolen bases''

Starting pitchers
Note: G = Games pitched; GS = Games started; CG = Complete games; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; BB = Bases on balls; SO = Strikeouts

Other pitchers
Note: G = Games pitched; GS = Games started; CG = Complete games; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; BB = Bases on balls; SO = Strikeouts

Relief pitchers
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; BB = Bases on balls; SO = Strikeouts

League top five finishers
Babe Herman
 * #2 in NL in stolen bases (17)

Dazzy Vance
 * #3 in NL in strikeouts (150)