| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rube Waddell | OAK | 6.3 | 190306120_CLE_OAK |
| Bill Dinneen | BOS | 3.87 | 190306100_DET_BOS |
| Bill Donovan | DET | 3.51 | 190306100_DET_BOS |
| Vic Willis | ATL | 1.86 | 190306120_ATL_SLN |
| Roy Patterson | CHA | 1.36 | 190306120_CHA_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Fred Mitchell | PHI | -4.27 | 190306100_PHI_PIT |
| Roy Evans | LAN | -2.85 | 190306110_LAN_PIT |
| Wiley Piatt | ATL | -1.09 | 190306100_ATL_CHN |
| Clarence Currie | SLN | -0.99 | 190306100_SFN_SLN |
| Bill Phillips | CIN | -0.44 | 190306100_LAN_CIN |
Based on accumulated WAA for this season up to 1903-06-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.62 | Rube Waddell | 144 | OAK |
| +002+ | 5.52 | Addie Joss | 109.3 | CLE |
| +003+ | 4.73 | Cy Young | 120.7 | BOS |
| +004+ | 4.6 | Bill Donovan | 87.7 | DET |
| +005+ | 4.55 | Eddie Plank | 99 | OAK |
| +006+ | 4.11 | Jack Chesbro | 113.7 | NYA |
| +007+ | 4 | Bill Dinneen | 99.7 | BOS |
| +008+ | 3.92 | Doc White | 88 | CHA |
| +009+ | 3.87 | George Mullin | 102 | DET |
| +010+ | 3.85 | Earl Moore | 80 | CLE |
| +011+ | 3.57 | Sam Leever | 90 | PIT |
| +012+ | 3.48 | Willie Sudhoff | 80 | BAL |
| +013+ | 3.34 | Joe McGinnity | 144.7 | SFN |
| +014+ | 3.27 | Jack Sutthoff | 84 | CIN |
| +016+ | 2.8 | Ed Siever | 66 | BAL |
| +018+ | 2.43 | Jack Taylor | 125.3 | CHN |
| +022+ | 2.25 | Roy Patterson | 81.3 | CHA |
| +024+ | 2.23 | Christy Mathewson | 116 | SFN |
| +027+ | 2.04 | Chief Bender | 92.3 | OAK |
| +029+ | 2.03 | Tom Hughes | 65.7 | BOS |
| +028+ | 2.03 | Red Donahue | 87 | BAL |
| +032+ | 1.95 | Bill Bernhard | 89 | CLE |
| +040+ | 1.51 | Frank Kitson | 77.3 | DET |
| +042+ | 1.41 | John Deering | 32.3 | DET |
| +043+ | 1.4 | Jack Powell | 78 | BAL |
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