2003 Milwaukee Brewers season

The Milwaukee Brewers' 2003 season involved the Brewers' finishing sixth in the National League Central with a record of 68 wins and 94 losses.

Offseason

 * October 11, 2002: Scott Podsednik was selected off waivers by the Milwaukee Brewers from the Seattle Mariners.
 * November 5, 2002: Brooks Kieschnick was signed as a free agent with the Milwaukee Brewers.
 * November 13, 2002: Scott Seabol was signed as a free agent with the Milwaukee Brewers.
 * January 31, 2003: John Vander Wal was signed as a free agent with the Milwaukee Brewers.
 * February 13, 2003: Tim Crabtree was signed as a free agent with the Milwaukee Brewers.

Regular season

 * On September 19, 2003, Arizona Diamondbacks pitcher Randy Johnson hit a home run off of Brewers pitcher Doug Davis, his only MLB home run.

Transactions

 * May 15, 2003: Scott Seabol was released by the Milwaukee Brewers.
 * June 3, 2003: Tony Gwynn, Jr. was drafted by the Milwaukee Brewers in the 2nd round of the 2003 amateur draft. Player signed June 19, 2003.

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

Farm system
The Brewers' farm system consisted of eight minor league affiliates in 2003. The Brewers operated a Venezuelan Summer League team as a co-op with the Cincinnati Reds.