| 1903 MLB Leaders | ||
| 1903 American League Standings | |||||||||
| TEAM | W | L | PCT | GB | HOME | ROAD | RS | RA | DIFF |
| *-Boston | 91 | 47 | .645 | -- | -- | -- | 708 | 504 | +204 |
| Philadelphia | 75 | 60 | .547 | 14.5 | -- | -- | 597 | 519 | +78 |
| Cleveland | 77 | 63 | .550 | 15 | -- | -- | 639 | 579 | +60 |
| New York | 72 | 62 | .529 | 17 | -- | -- | 579 | 573 | +6 |
| Detroit | 65 | 71 | .474 | 25 | -- | -- | 567 | 539 | +28 |
| St. Louis | 65 | 74 | .468 | 26.5 | -- | -- | 500 | 525 | -25 |
| Chicago | 60 | 77 | .435 | 30.5 | -- | -- | 516 | 613 | -97 |
| Washington | 43 | 94 | .307 | 47.5 | -- | -- | 437 | 691 | -254 |
| 1903 National League Standings | |||||||||
| TEAM | W | L | PCT | GB | HOME | ROAD | RS | RA | DIFF |
| *-Pittsburgh | 91 | 49 | .645 | -- | -- | -- | 793 | 613 | +180 |
| New York | 84 | 55 | .592 | 6.5 | -- | -- | 729 | 567 | +162 |
| Chicago | 82 | 56 | .590 | 8 | -- | -- | 695 | 599 | +96 |
| Cincinnati | 74 | 65 | .525 | 16.5 | -- | -- | 765 | 656 | +109 |
| Brooklyn | 70 | 66 | .504 | 19 | -- | -- | 667 | 682 | -15 |
| Boston | 58 | 80 | .414 | 32 | -- | -- | 578 | 699 | -121 |
| Philadelphia | 49 | 86 | .353 | 39.5 | -- | -- | 617 | 738 | -121 |
| St. Louis | 43 | 94 | .309 | 46.5 | -- | -- | 505 | 795 | -290 |
| 1903 All-Star Results | |||||||||
| No results available. | |||||||||
| Rosters | Complete Results | |||||||||
| 1903 Postseason Results | ||
| ROUND | OUTCOME | RESULT |
| World Series | Boston Americans defeated Pittsburgh Pirates | 5-3 |
| Complete Results | ||
| 1903 Award Winners | ||
| No award winners. | ||
| Complete Results |
| 1903 Draft Picks | |||
| No picks available. | |||
| Complete Results |
| 1903 No-Hitters | ||||||
| DATE | PITCHER | TEAM | OPPONENT | SCORE | LEAGUE | NOTES |
| 9/18/1903 | Chick Fraser | PHI | CHI | 10-0 | NL | |
| Complete Results | ||||||