| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walter Johnson | MIN | 13.03 | 191507032_MIN_NYA |
| Jim Scott | CHA | 5.09 | 191507010_CHA_DET |
| Smoky Joe Wood | BOS | 1.82 | 191507032_OAK_BOS |
| Erskine Mayer | PHI | 1.62 | 191507010_ATL_PHI |
| Bert Humphries | CHN | 1.13 | 191507031_PIT_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roy Walker | CLE | -2.01 | 191507031_CLE_BAL |
| Weldon Wyckoff | OAK | -1.71 | 191507032_OAK_BOS |
| Bill James | BAL | -1.27 | 191507010_CLE_BAL |
| Ray Collins | BOS | -1.11 | 191507031_OAK_BOS |
| Cy Pieh | NYA | -0.99 | 191507020_MIN_NYA |
Based on accumulated WAA for this season up to 1915-07-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.78 | Walter Johnson | 155.3 | MIN |
| +003+ | 5.75 | Pete Alexander | 171 | PHI |
| +007+ | 3.63 | Red Faber | 158.7 | CHA |
| +009+ | 3.49 | Erskine Mayer | 137.7 | PHI |
| +010+ | 3.36 | Smoky Joe Wood | 76.7 | BOS |
| +012+ | 3.07 | Jim Scott | 122.7 | CHA |
| +016+ | 2.83 | Hooks Dauss | 149.3 | DET |
| +017+ | 2.75 | Bob Harmon | 115.7 | PIT |
| +019+ | 2.47 | Al Mamaux | 108.7 | PIT |
| +020+ | 2.46 | Guy Morton | 139 | CLE |
| +021+ | 2.38 | Bert Humphries | 60 | CHN |
| +023+ | 2.13 | Jeff Pfeffer | 109 | LAN |
| +027+ | 1.87 | Sherry Smith | 77.3 | LAN |
| +029+ | 1.85 | Sailor Stroud | 82 | SFN |
| +032+ | 1.81 | Bert Gallia | 101.3 | MIN |
| +033+ | 1.8 | Harry Coveleski | 134 | DET |
| +035+ | 1.79 | Jack Coombs | 82.3 | LAN |
| +038+ | 1.74 | Joe Benz | 103 | CHA |
| +039+ | 1.65 | George Pierce | 83.3 | CHN |
| +046+ | 1.5 | Fred Toney | 50.3 | CIN |
| +047+ | 1.47 | Wheezer Dell | 130.3 | LAN |
| +048+ | 1.44 | Pete Schneider | 96 | CIN |
| +051+ | 1.39 | Pat Ragan | 99.7 | TOT |
| +052+ | 1.38 | Zip Zabel | 101 | CHN |
| +054+ | 1.35 | Reb Russell | 97.3 | CHA |
_