| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walter Johnson | MIN | 10.66 | 191206262_BOS_MIN |
| Christy Mathewson | SFN | 5.08 | 191206281_ATL_SFN |
| Slim Sallee | SLN | 2.98 | 191206260_PIT_SLN |
| Chief Bender | OAK | 2.32 | 191206281_OAK_MIN |
| Smoky Joe Wood | BOS | 1.5 | 191206262_BOS_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Earl Hamilton | BAL | -2.83 | 191206280_CLE_BAL |
| Bob Harmon | SLN | -2.43 | 191206280_SLN_CIN |
| Jack Quinn | NYA | -2.31 | 191206262_NYA_OAK |
| Hippo Vaughn | MIN | -2.09 | 191206281_OAK_MIN |
| Ralph Works | DET | -0.96 | 191206270_DET_CLE |
Based on accumulated WAA for this season up to 1912-06-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.48 | Rube Marquard | 142.3 | SFN |
| +002+ | 8 | Walter Johnson | 153.3 | MIN |
| +003+ | 6.25 | Slim Sallee | 140 | SLN |
| +004+ | 5.3 | Larry Cheney | 141.7 | CHN |
| +006+ | 5.1 | Christy Mathewson | 124.7 | SFN |
| +007+ | 4.79 | Marty O'Toole | 122 | PIT |
| +009+ | 4.63 | Rube Benton | 136 | CIN |
| +010+ | 4.34 | George Suggs | 113.7 | CIN |
| +011+ | 4.08 | Ed Walsh | 167.7 | CHA |
| +014+ | 3.87 | Joe Benz | 114.3 | CHA |
| +015+ | 3.79 | Lew Richie | 82.7 | CHN |
| +016+ | 3.71 | Claude Hendrix | 121.7 | PIT |
| +017+ | 3.65 | Nap Rucker | 111.7 | LAN |
| +019+ | 3.22 | Red Ames | 85.7 | SFN |
| +020+ | 3.18 | Hooks Wiltse | 70 | SFN |
| +022+ | 2.93 | Ad Brennan | 106.3 | PHI |
| +023+ | 2.69 | Jimmy Lavender | 84.3 | CHN |
| +024+ | 2.56 | Charley Hall | 105 | BOS |
| +025+ | 2.55 | Smoky Joe Wood | 158.3 | BOS |
| +028+ | 2.45 | Vean Gregg | 96.3 | CLE |
| +030+ | 2.38 | Chief Bender | 94.3 | OAK |
| +037+ | 1.97 | Bert Humphries | 67.7 | CIN |
| +038+ | 1.96 | Hub Perdue | 112.3 | ATL |
| +042+ | 1.89 | Cliff Curtis | 48 | PHI |
| +043+ | 1.86 | Howie Camnitz | 115.7 | PIT |
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