| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walter Johnson | MIN | 15.61 | 191507132_MIN_BAL |
| Pete Alexander | PHI | 11.62 | 191507130_SLN_PHI |
| Jim Scott | CHA | 2.77 | 191507130_OAK_CHA |
| Al Mamaux | PIT | 2.34 | 191507122_PIT_PHI |
| Hooks Dauss | DET | 1.59 | 191507110_BOS_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roy Walker | CLE | -2.72 | 191507131_BOS_CLE |
| Weldon Wyckoff | OAK | -1.82 | 191507110_OAK_BAL |
| Boardwalk Brown | NYA | -1.56 | 191507110_NYA_CLE |
| Bill James | BAL | -0.99 | 191507131_MIN_BAL |
| Babe Ruth | BOS | -0.91 | 191507131_BOS_CLE |
Based on accumulated WAA for this season up to 1915-07-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 7.41 | Pete Alexander | 198 | PHI |
| +003+ | 6.42 | Walter Johnson | 177.7 | MIN |
| +007+ | 3.99 | Al Mamaux | 135.7 | PIT |
| +011+ | 3.36 | Jim Scott | 145.7 | CHA |
| +013+ | 3.2 | Smoky Joe Wood | 85.7 | BOS |
| +015+ | 3.01 | Bob Harmon | 139.7 | PIT |
| +016+ | 2.98 | Erskine Mayer | 157.7 | PHI |
| +017+ | 2.97 | Red Faber | 174 | CHA |
| +023+ | 2.37 | Sherry Smith | 96 | LAN |
| +028+ | 2.05 | Ray Fisher | 145.7 | NYA |
| +029+ | 2.02 | Wheezer Dell | 147.7 | LAN |
| +030+ | 1.98 | Bert Humphries | 73.3 | CHN |
| +031+ | 1.97 | Sailor Stroud | 92.7 | SFN |
| +032+ | 1.96 | Gene Dale | 133.7 | CIN |
| +034+ | 1.92 | Jack Coombs | 86 | LAN |
| +035+ | 1.91 | Bill Doak | 157.3 | SLN |
| +036+ | 1.85 | Hooks Dauss | 159.3 | DET |
| +037+ | 1.83 | Pat Ragan | 123.7 | TOT |
| +042+ | 1.75 | Guy Morton | 150 | CLE |
| +046+ | 1.61 | Eppa Rixey | 91.3 | PHI |
| +047+ | 1.6 | Rube Foster | 134 | BOS |
| +052+ | 1.5 | Jeff Pfeffer | 130.3 | LAN |
| +054+ | 1.47 | Ernie Shore | 103.7 | BOS |
| +053+ | 1.47 | Harry Coveleski | 160 | DET |
| +058+ | 1.45 | Joe Benz | 114.3 | CHA |
_