2003 Colorado Rockies season

The Colorado Rockies' 2003 season was the 11th for the Rockies attempting to win the National League West. Clint Hurdle was the manager. They played home games at Coors Field. They finished with a record of 74–88, fourth in the NL West.

Offseason

 * November 16, 2002: Mike Hampton was traded by the Colorado Rockies with Juan Pierre and cash to the Florida Marlins for Charles Johnson, Preston Wilson, Pablo Ozuna, and Vic Darensbourg.
 * January 8, 2003: Chris Stynes was signed as a free agent by the Colorado Rockies.
 * January 23, 2003: Steve Reed was signed as a free agent by the Colorado Rockies.
 * January 24, 2003: José Hernández and Mark Sweeney were signed as free agents by the Colorado Rockies.
 * February 3, 2003: Darren Oliver was signed as a free agent by the Colorado Rockies.
 * March 21, 2003: Jack Cust was traded by the Colorado Rockies to the Baltimore Orioles for Chris Richard.

Notable transactions

 * April 9, 2003: Greg Vaughn was signed as a free agent by the Colorado Rockies.
 * June 3, 2003: Ian Stewart was drafted by the Colorado Rockies in the 1st round of the 2003 amateur draft. Player signed June 11, 2003.
 * June 20, 2003: José Hernández was traded by the Colorado Rockies to the Chicago Cubs for Mark Bellhorn.
 * June 28, 2003: Gabe Kapler was purchased by the Boston Red Sox from the Colorado Rockies.
 * July 13, 2003: Ben Petrick was traded by the Colorado Rockies to the Detroit Tigers for Adam Bernero.
 * August 26, 2003: Gregg Zaun was signed as a free agent by the Colorado Rockies.

Major League debuts

 * Batters:
 * René Reyes (Jul 22)
 * Garrett Atkins (Aug 3)
 * Clint Barmes (Sep 5)
 * Pitchers:
 * Javier López (Apr 1)
 * Jason Young (May 12)
 * Matt Miller (Jun 27)
 * Chin-hui Tsao (Jul 25)

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