2003 Seattle Mariners season

The Seattle Mariners 2003 season was their 27th since the franchise creation. The team finished second in the American League West with a record of 93–69.

The team used only five starting pitchers the entire season, which was unusual. The five starting pitchers were Ryan Franklin, Freddy Garcia, Gil Meche, Jamie Moyer and Joel Piñeiro.

Offseason

 * October 11, 2002: Scott Podsednik was selected off waivers by the Milwaukee Brewers from the Seattle Mariners.
 * November 15, 2002: Mariners named Bob Melvin, as the team's new manager, after Lou Piniella left to manage the Tampa Bay Devil Rays.
 * December 6, 2002: John Olerud was signed as a free agent with the Seattle Mariners.
 * January 16, 2003: John Mabry was signed as a free agent with the Seattle Mariners.

Opening Day starters

 * Bret Boone
 * Mike Cameron
 * Jeff Cirillo
 * Carlos Guillén
 * Mark McLemore
 * Jamie Moyer
 * John Olerud
 * Ichiro Suzuki
 * Dan Wilson
 * Randy Winn

Notable transactions

 * July 29, 2003: Kenny Kelly was traded by the Seattle Mariners to the New York Mets for Rey Sánchez and cash.

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

Relief pitchers
Note; G = Games pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts

Awards and honors
2003 Major League Baseball All-Star Game
 * Jamie Moyer, Pitcher, Roberto Clemente Award
 * Jamie Moyer, Hutch Award

Farm system
LEAGUE CHAMPIONS: San Antonio, Inland Empire

Major League Baseball Draft
The following is a list of 2003 Seattle Mariners draft picks. The Mariners took part in both the Rule 4 draft (June amateur draft) and the Rule 5 draft. The Mariners made 53 selections in the 2003 draft, the first being shortstop Adam Jones in the first round. In all, the Mariners selected 30 pitchers, 8 outfielders, 6 catchers, 4 shortstops, 4 third basemen, and 1 first baseman.