The 1975 Baltimore Orioles season concluded with the ball club finishing 4 1/2 games behind the Boston Red Sox in second place in the American League East with a 90–69 record. The team stayed in playoff contention until a doubleheader sweep by the New York Yankees at Shea Stadium on the penultimate day of the regular season on September 27. Both the Orioles and Red Sox played less than a full 162-game schedule (159 and 160 respectively) primarily due to heavy rainfall across the Eastern United States in the wake of Hurricane Eloise. The regular season would have been extended two days had the divisional title race not been decided by September 28, with the Orioles hosting the Chicago White Sox in a single night game and the Detroit Tigers in a twi-night doubleheader and the Red Sox twice playing the Yankees at Shea simultaneously. Further lack of resolution would have necessitated a one-game playoff at Memorial Stadium on October 1. The Orioles sustained a net operating loss of $3,192.

Offseason

Regular season

Season standings

Record vs. opponents

Notable transactions

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

Farm system