2005 Florida Marlins season

The Florida Marlins' 2005 season was the 13th season for the Major League Baseball (MLB) franchise in the National League. It would begin with the team attempting to improve on their season from 2004. Their manager was Jack McKeon. They played home games at Dolphin Stadium. They finished with a record of 83–79, third in the National League East and failed to make the playoffs for the second consecutive season.

Offseason

 * October 8, 2004: Billy Koch was released by the Florida Marlins.
 * January 26, 2005: Carlos Delgado was signed as a free agent with the Florida Marlins.

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