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. They would not make the playoffs for the second straight year and despite that, this was their last winning season until 2007.
The team used only five starting pitchers the entire season, which was unusual. The five starting pitchers were Ryan Franklin, Freddy García, Gil Meche, Jamie Moyer, and Joel Piñeiro.
Offseason
- October 11, 2002: Scott Podsednik was selected off waivers by the Milwaukee Brewers from the Mariners.
- November 15: Mariners named Bob Melvin, as the team's new manager, after Lou Piniella left to manage the Tampa Bay Devil Rays.
- December 6: John Olerud re-signed as a free agent with the Mariners.
- January 16, 2003: John Mabry signed as a free agent with Seattle.
Regular season
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.
Player stats
Batting
Starters by position
Note: Pos = Position; G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in| Pos | Player | G | AB | H | Avg. | HR | RBI |
| C | Dan Wilson | 96 | 316 | 76 | .241 | 4 | 43 |
| 1B | John Olerud | 152 | 539 | 145 | .269 | 10 | 83 |
| 2B | Bret Boone | 159 | 622 | 183 | .294 | 35 | 117 |
| SS | Carlos Guillén | 109 | 388 | 107 | .276 | 7 | 52 |
| 3B | Jeff Cirillo | 87 | 258 | 53 | .205 | 2 | 23 |
| LF | Randy Winn | 157 | 600 | 177 | .295 | 11 | 75 |
| CF | Mike Cameron | 147 | 534 | 135 | .253 | 18 | 76 |
| RF | Ichiro Suzuki | 159 | 679 | 212 | .312 | 13 | 62 |
| DH | Edgar Martínez | 145 | 497 | 146 | .294 | 24 | 98 |
Other batters
Note: G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in| Player | G | AB | H | Avg. | HR | RBI |
| Mark McLemore | 99 | 309 | 72 | .233 | 2 | 37 |
| Ben Davis | 80 | 246 | 58 | .236 | 6 | 42 |
| Willie Bloomquist | 89 | 196 | 49 | .250 | 1 | 14 |
| Rey Sánchez | 46 | 170 | 50 | .294 | 0 | 11 |
| John Mabry | 64 | 104 | 22 | .212 | 3 | 16 |
| Greg Colbrunn | 22 | 58 | 16 | .276 | 3 | 7 |
| Pat Borders | 12 | 14 | 2 | .143 | 0 | 1 |
| Luis Ugueto | 12 | 5 | 1 | .200 | 0 | 1 |
| Jamal Strong | 12 | 2 | 0 | .000 | 0 | 0 |
| Chad Meyers | 9 | 1 | 0 | .000 | 0 | 0 |
Pitching
Starting pitchers
Note; G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts| Player | G | IP | W | L | ERA | SO |
| Jamie Moyer | 33 | 215.0 | 21 | 7 | 3.27 | 129 |
| Ryan Franklin | 32 | 212.0 | 11 | 13 | 3.57 | 99 |
| Joel Piñeiro | 32 | 211.2 | 16 | 11 | 3.78 | 151 |
| Freddy García | 33 | 201.1 | 12 | 14 | 4.51 | 144 |
| Gil Meche | 32 | 186.1 | 15 | 13 | 4.59 | 130 |
Relief pitchers
Note; G = Games pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts| Player | G | W | L | SV | ERA | SO |
| Shigetoshi Hasegawa | 63 | 2 | 4 | 16 | 1.48 | 32 |
| Arthur Rhodes | 67 | 3 | 3 | 3 | 4.17 | 48 |
| Julio Mateo | 50 | 4 | 0 | 1 | 3.15 | 71 |
| Jeff Nelson | 46 | 3 | 2 | 7 | 3.35 | 47 |
| Rafael Soriano | 40 | 3 | 0 | 1 | 1.53 | 68 |
| Kazuhiro Sasaki | 35 | 1 | 2 | 10 | 4.05 | 29 |
| Giovanni Carrara | 23 | 2 | 0 | 0 | 6.83 | 13 |
| Armando Benítez | 15 | 0 | 0 | 0 | 3.14 | 15 |
| Aaron Taylor | 10 | 0 | 0 | 0 | 8.53 | 9 |
| Aaron Looper | 6 | 0 | 0 | 0 | 5.14 | 6 |
| Brian Sweeney | 5 | 0 | 0 | 0 | 1.93 | 7 |
| J.J. Putz | 3 | 0 | 0 | 0 | 4.91 | 3 |
| Matt White | 3 | 0 | 0 | 0 | 13.50 | 0 |
Awards and honors
- Jamie Moyer, Roberto Clemente Award and Hutch Award
- MLB All-Stars: Moyer, Ichiro Suzuki, Edgar Martínez, Bret Boone, Shigetoshi Hasegawa