2004 Tampa Bay Devil Rays season

The 2004 Tampa Bay Devil Rays season was their seventh since the franchise was created. This season, they finished fourth in the American League East, 3 games ahead of the Toronto Blue Jays, who finished in last place. They managed to finish the season with a record of 70–91, finishing out of last for the first time in their 7-year history. Their manager was Lou Piniella who entered his second season with the Devil Rays.

Notable transactions

 * February 10, 2004: Midre Cummings was signed as a free agent with the Tampa Bay Devil Rays.
 * July 30, 2004: Scott Kazmir was traded by the New York Mets with Jose Diaz to the Tampa Bay Devil Rays for Bartolomé Fortunato and Víctor Zambrano.
 * August 19, 2004: Randall Simon was signed as a free agent with the Tampa Bay Devil Rays.
 * September 10, 2004: Randall Simon was released by the Tampa Bay Devil Rays.

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