The Oakland Athletics' 2004 season involved the Athletics finishing second in the American League West with a record of 91 wins and 71 losses. The Athletics missed the postseason for the first time since 1999.
Offseason
- October 9, 2003: Marco Scutaro was selected off waivers by the Oakland Athletics from the New York Mets.
- November 18, 2003: Ted Lilly was traded by the Oakland Athletics to the Toronto Blue Jays for Bobby Kielty.
- November 26, 2003: Mark Kotsay was traded by the San Diego Padres to the Oakland Athletics for Terrence Long and Ramón Hernández.
- December 3, 2003: Wayne Gomes was signed as a free agent with the Oakland Athletics.
- February 6, 2004: Eric Karros was signed as a free agent with the Oakland Athletics.
- March 15, 2004: Mike Oquist was signed as a free agent with the Oakland Athletics.
Regular season
Season standings
Record vs. opponents
Transactions
- April 17, 2004: Kirk Saarloos was traded by the Houston Astros to the Oakland Athletics for Chad Harville.
- August 3, 2004: Eric Karros was released by the Oakland Athletics.
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; IP = Innings pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned runs average; SO = Strikeouts
Farm system
<small>LEAGUE CHAMPIONS: Sacramento, Modesto</small>
References