| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bullet Joe Bush | OAK | -3.39 | 191507051_OAK_NYA |
| Roy Walker | CLE | -2.43 | 191507060_DET_CLE |
| Bill James | BAL | -1.61 | 191507051_CHA_BAL |
| Marty McHale | NYA | -1.59 | 191507060_OAK_NYA |
| Rube Marquard | SFN | -1.09 | 191507060_SFN_PHI |
Based on accumulated WAA for this season up to 1915-07-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 6.36 | Pete Alexander | 180 | PHI |
| +003+ | 6.04 | Walter Johnson | 163.3 | MIN |
| +007+ | 3.81 | Red Faber | 170.3 | CHA |
| +010+ | 3.4 | Smoky Joe Wood | 76.7 | BOS |
| +011+ | 3.37 | Bob Harmon | 124.7 | PIT |
| +013+ | 3.1 | Al Mamaux | 117.7 | PIT |
| +015+ | 2.82 | Hooks Dauss | 149.3 | DET |
| +018+ | 2.64 | Erskine Mayer | 140.7 | PHI |
| +020+ | 2.53 | Jeff Pfeffer | 118 | LAN |
| +022+ | 2.22 | Bert Humphries | 65 | CHN |
| +023+ | 2.17 | Jim Scott | 127.7 | CHA |
| +025+ | 2.04 | Jack Coombs | 86 | LAN |
| +026+ | 1.97 | Sailor Stroud | 83.7 | SFN |
| +030+ | 1.92 | Sherry Smith | 78 | LAN |
| +032+ | 1.88 | Bert Gallia | 101.3 | MIN |
| +040+ | 1.62 | Wheezer Dell | 138.7 | LAN |
| +043+ | 1.57 | Ray Fisher | 132.7 | NYA |
| +047+ | 1.46 | Joe Benz | 108 | CHA |
| +048+ | 1.45 | Ernie Shore | 98 | BOS |
| +049+ | 1.44 | Rube Foster | 120 | BOS |
| +050+ | 1.43 | Dan Griner | 108.3 | SLN |
| +053+ | 1.4 | Gene Dale | 119.7 | CIN |
| +054+ | 1.37 | Reb Russell | 97.3 | CHA |
| +055+ | 1.36 | Fred Toney | 58.7 | CIN |
| +057+ | 1.34 | Bill Doak | 143.3 | SLN |
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