| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rube Waddell | OAK | 5.11 | 190307140_CHA_OAK |
| Doc White | CHA | 4.69 | 190307140_CHA_OAK |
| Bill Donovan | DET | 4.11 | 190307130_DET_NYA |
| Bill Dinneen | BOS | 3.65 | 190307140_CLE_BOS |
| Addie Joss | CLE | 2.18 | 190307151_CLE_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Fred Mitchell | PHI | -3.18 | 190307150_PHI_SLN |
| Togie Pittinger | ATL | -2.96 | 190307150_ATL_CHN |
| Mordecai Brown | SLN | -1.28 | 190307130_PHI_SLN |
| Ned Garvin | LAN | -1.25 | 190307130_LAN_CHN |
| Bob Wicker | CHN | -0.42 | 190307140_LAN_CHN |
Based on accumulated WAA for this season up to 1903-07-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.4 | Cy Young | 184.7 | BOS |
| +002+ | 7.81 | Rube Waddell | 218 | OAK |
| +003+ | 7.61 | Addie Joss | 173.7 | CLE |
| +004+ | 7.4 | Doc White | 169.3 | CHA |
| +005+ | 6.85 | Bill Donovan | 155.7 | DET |
| +006+ | 6.38 | George Mullin | 171 | DET |
| +007+ | 6.37 | Bill Dinneen | 164.7 | BOS |
| +008+ | 6.21 | Earl Moore | 141.7 | CLE |
| +009+ | 5.88 | Bill Bernhard | 154.3 | CLE |
| +010+ | 5.31 | Eddie Plank | 162.7 | OAK |
| +011+ | 5.23 | Willie Sudhoff | 139.3 | BAL |
| +013+ | 4.79 | Jack Chesbro | 177.3 | NYA |
| +014+ | 4.4 | Sam Leever | 140 | PIT |
| +017+ | 3.84 | Chief Bender | 153.3 | OAK |
| +018+ | 3.83 | Barney Wolfe | 95.3 | NYA |
| +019+ | 3.77 | Christy Mathewson | 194.3 | SFN |
| +021+ | 3.63 | Red Donahue | 131 | BAL |
| +022+ | 3.41 | Roy Patterson | 117 | CHA |
| +025+ | 3.04 | Ed Siever | 106.3 | BAL |
| +027+ | 2.92 | Tom Hughes | 103.7 | BOS |
| +028+ | 2.92 | Jesse Tannehill | 144.3 | NYA |
| +031+ | 2.59 | Joe McGinnity | 231.3 | SFN |
| +036+ | 2.42 | Frank Kitson | 123.7 | DET |
| +041+ | 2 | Noodles Hahn | 138.7 | CIN |
| +044+ | 1.88 | Deacon Phillippe | 158.7 | PIT |
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