| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rube Foster | BOS | 1.84 | 191509110_CHA_BOS |
| Jeff Tesreau | SFN | 1.54 | 191509100_SFN_PHI |
| Fred Toney | CIN | 1.5 | 191509122_SFN_CIN |
| Jeff Pfeffer | LAN | 0.85 | 191509120_LAN_SLN |
| Dick Rudolph | ATL | 0.78 | 191509102_ATL_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Red Ames | SLN | -1.77 | 191509120_LAN_SLN |
| Bill James | DET | -1.59 | 191509100_DET_CLE |
| Jack Nabors | OAK | -1.49 | 191509111_BAL_OAK |
| Christy Mathewson | SFN | -0.87 | 191509110_SFN_CIN |
| George Pierce | CHN | -0.82 | 191509110_ATL_CHN |
Based on accumulated WAA for this season up to 1915-09-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 11.71 | Pete Alexander | 326.3 | PHI |
| +003+ | 8.47 | Walter Johnson | 291.7 | MIN |
| +010+ | 4.82 | Ernie Shore | 208 | BOS |
| +012+ | 4.46 | Fred Toney | 185 | CIN |
| +014+ | 4.36 | Al Mamaux | 228.7 | PIT |
| +021+ | 3.76 | Guy Morton | 238 | CLE |
| +023+ | 3.73 | Rube Foster | 223.7 | BOS |
| +026+ | 3.48 | Harry Coveleski | 277 | DET |
| +027+ | 3.23 | Jeff Pfeffer | 233.7 | LAN |
| +029+ | 3.17 | Dick Rudolph | 292.3 | ATL |
| +031+ | 3.11 | Gene Dale | 252.7 | CIN |
| +032+ | 2.95 | Jeff Tesreau | 258.7 | SFN |
| +035+ | 2.83 | Bob Harmon | 246.7 | PIT |
| +036+ | 2.8 | Tom Hughes | 234.7 | ATL |
| +041+ | 2.68 | Bert Gallia | 226 | MIN |
| +043+ | 2.54 | Doc Ayers | 182.3 | MIN |
| +047+ | 2.44 | Pete Schneider | 235.7 | CIN |
| +048+ | 2.42 | Joe Benz | 198.7 | CHA |
| +049+ | 2.39 | Jimmy Lavender | 181.3 | CHN |
| +054+ | 2.28 | Hooks Dauss | 274.7 | DET |
| +058+ | 2.11 | Harry Harper | 57.7 | MIN |
| +061+ | 2 | Erskine Mayer | 243 | PHI |
| +063+ | 1.97 | Dutch Leonard | 144.3 | BOS |
| +067+ | 1.82 | Red Faber | 267 | CHA |
| +070+ | 1.75 | Ernie Koob | 108.3 | BAL |
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