The Oakland Athletics' 2003 season ended with the A's finishing first in the American League West with a record of 96 wins and 66 losses.

Offseason

Regular season

Season standings

Record vs. opponents

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

Postseason

2003 ALDS

Game 1: Oakland 5 – Boston 4. Game 2: Oakland 5 – Boston 1. Game 3: Boston 3 – Oakland 1. Game 4: Boston 5 – Oakland 4. Game 5: Boston 4 – Oakland 3.

Farm system

LEAGUE CHAMPIONS: Sacramento