| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rube Waddell | OAK | 7.06 | 190307042_DET_OAK |
| Cy Young | BOS | 6.99 | 190307060_BAL_BOS |
| Bill Donovan | DET | 4.4 | 190307042_DET_OAK |
| Doc White | CHA | 4.17 | 190307041_CHA_NYA |
| Ed Siever | BAL | 1.85 | 190307041_BAL_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Fred Mitchell | PHI | -4.02 | 190307060_PHI_PIT |
| Wiley Piatt | ATL | -3.53 | 190307041_ATL_SLN |
| Ned Garvin | LAN | -1.86 | 190307061_LAN_CIN |
| Ed Poole | CIN | -1.79 | 190307041_LAN_CIN |
| Jock Menefee | CHN | -1.16 | 190307060_SFN_CHN |
Based on accumulated WAA for this season up to 1903-07-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.7 | Cy Young | 166.7 | BOS |
| +002+ | 7.4 | Rube Waddell | 204 | OAK |
| +003+ | 6.88 | Bill Donovan | 128.7 | DET |
| +004+ | 6.62 | Addie Joss | 155.3 | CLE |
| +005+ | 6.52 | George Mullin | 152 | DET |
| +006+ | 5.9 | Doc White | 142.3 | CHA |
| +007+ | 5.81 | Bill Dinneen | 143.7 | BOS |
| +008+ | 5.43 | Earl Moore | 121 | CLE |
| +009+ | 5.26 | Jack Chesbro | 158.3 | NYA |
| +010+ | 4.95 | Eddie Plank | 144.7 | OAK |
| +012+ | 4.5 | Bill Bernhard | 134 | CLE |
| +013+ | 4.36 | Willie Sudhoff | 121 | BAL |
| +016+ | 3.87 | Sam Leever | 131 | PIT |
| +017+ | 3.85 | Tom Hughes | 101.7 | BOS |
| +018+ | 3.83 | Roy Patterson | 109 | CHA |
| +019+ | 3.6 | Red Donahue | 131 | BAL |
| +021+ | 3.26 | Chief Bender | 135.3 | OAK |
| +022+ | 3.19 | Barney Wolfe | 78.3 | NYA |
| +023+ | 3.17 | Joe McGinnity | 204.3 | SFN |
| +024+ | 2.9 | Christy Mathewson | 170 | SFN |
| +032+ | 2.36 | Jesse Tannehill | 123.3 | NYA |
| +039+ | 2.08 | Frank Kitson | 106.3 | DET |
| +040+ | 2 | Ed Siever | 88.3 | BAL |
| +042+ | 1.97 | Noodles Hahn | 122.7 | CIN |
| +047+ | 1.73 | John Deering | 52.7 | DET |
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