| Starter | Tm | Tier | Game |
|---|---|---|---|
| Cy Young | BOS | 5.97 | 190307290_NYA_BOS |
| Rube Waddell | OAK | 5.37 | 190307270_MIN_OAK |
| Addie Joss | CLE | 2.44 | 190307270_CLE_BAL |
| Willie Sudhoff | BAL | 1.75 | 190307270_CLE_BAL |
| George Mullin | DET | 1.66 | 190307270_DET_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike O'Neill | SLN | -3.86 | 190307280_SLN_CHN |
| Fred Mitchell | PHI | -3.67 | 190307280_PHI_LAN |
| Togie Pittinger | ATL | -3.21 | 190307270_ATL_SFN |
| Henry Schmidt | LAN | -1.59 | 190307290_PHI_LAN |
| Jack Harper | CIN | -1.14 | 190307290_PIT_CIN |
Based on accumulated WAA for this season up to 1903-07-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.56 | Rube Waddell | 253 | OAK |
| +002+ | 9.3 | Bill Donovan | 182.7 | DET |
| +003+ | 9.02 | Cy Young | 215.7 | BOS |
| +004+ | 8.22 | Earl Moore | 168.7 | CLE |
| +005+ | 7.9 | George Mullin | 197 | DET |
| +006+ | 7.28 | Bill Dinneen | 173.7 | BOS |
| +007+ | 6.99 | Willie Sudhoff | 168.3 | BAL |
| +008+ | 6.96 | Addie Joss | 198.7 | CLE |
| +009+ | 6.9 | Bill Bernhard | 165.7 | CLE |
| +010+ | 6.64 | Doc White | 181.3 | CHA |
| +011+ | 6.35 | Eddie Plank | 189.3 | OAK |
| +014+ | 4.63 | Chief Bender | 170.3 | OAK |
| +017+ | 4.42 | Tom Hughes | 128.7 | BOS |
| +019+ | 4.19 | Ed Siever | 140.3 | BAL |
| +021+ | 3.74 | Red Donahue | 131 | BAL |
| +022+ | 3.66 | Christy Mathewson | 219.3 | SFN |
| +023+ | 3.63 | Frank Kitson | 141.7 | DET |
| +025+ | 3.47 | Roy Patterson | 148 | CHA |
| +026+ | 3.34 | Sam Leever | 169 | PIT |
| +028+ | 3.27 | Jack Chesbro | 205.3 | NYA |
| +035+ | 2.82 | Clark Griffith | 141.7 | NYA |
| +036+ | 2.75 | Highball Wilson | 155.3 | MIN |
| +048+ | 2.09 | Casey Patten | 200.7 | MIN |
| +049+ | 2.06 | Watty Lee | 81.7 | MIN |
| +055+ | 1.75 | Jake Weimer | 175 | CHN |
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