| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walter Johnson | MIN | 11.83 | 191506160_CHA_MIN |
| Jim Scott | CHA | 2.97 | 191506170_CHA_OAK |
| Rube Foster | BOS | 1.51 | 191506180_BAL_BOS |
| Bert Humphries | CHN | 1.47 | 191506170_LAN_CHN |
| Erskine Mayer | PHI | 1.32 | 191506170_PHI_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bullet Joe Bush | OAK | -3.89 | 191506180_CHA_OAK |
| Pol Perritt | SFN | -1.59 | 191506180_SFN_PIT |
| George McQuillan | PIT | -1.28 | 191506170_SFN_PIT |
| Parson Perryman | BAL | -1.23 | 191506170_BAL_BOS |
| George Chalmers | PHI | -1.13 | 191506160_PHI_PIT |
Based on accumulated WAA for this season up to 1915-06-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.44 | Pete Alexander | 135 | PHI |
| +004+ | 3.59 | Walter Johnson | 122.3 | MIN |
| +007+ | 2.98 | Erskine Mayer | 110.7 | PHI |
| +010+ | 2.6 | Jim Scott | 88.3 | CHA |
| +011+ | 2.44 | Smoky Joe Wood | 60 | BOS |
| +013+ | 2.22 | Bert Humphries | 46.3 | CHN |
| +015+ | 2.16 | Al Mamaux | 96 | PIT |
| +016+ | 2.13 | Red Faber | 121.7 | CHA |
| +018+ | 2.05 | Harry Coveleski | 110.7 | DET |
| +019+ | 2 | Rube Foster | 95.3 | BOS |
| +026+ | 1.67 | Guy Morton | 109.3 | CLE |
| +027+ | 1.63 | Joe Benz | 77 | CHA |
| +028+ | 1.62 | Bob Harmon | 85 | PIT |
| +029+ | 1.59 | Wheezer Dell | 111 | LAN |
| +031+ | 1.57 | Ernie Shore | 79 | BOS |
| +032+ | 1.57 | Reb Russell | 91.7 | CHA |
| +034+ | 1.49 | Hooks Dauss | 121.3 | DET |
| +037+ | 1.39 | Tom Hughes | 102 | ATL |
| +040+ | 1.27 | Jean Dubuc | 124.3 | DET |
| +039+ | 1.27 | Hank Robinson | 49.7 | SLN |
| +041+ | 1.26 | Ray Fisher | 98.7 | NYA |
| XXXXX | 1.21 | Sailor Stroud | 57 | SFN |
| XXXXX | 1.12 | Jeff Pfeffer | 91 | LAN |
| XXXXX | 1.05 | Sherry Smith | 51.3 | LAN |
| XXXXX | 1.04 | George Chalmers | 64 | PHI |
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