| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walter Johnson | MIN | 10.66 | 191206262_BOS_MIN |
| Ed Walsh | CHA | 6.98 | 191206250_BAL_CHA |
| Rube Marquard | SFN | 6.71 | 191206250_PHI_SFN |
| Slim Sallee | SLN | 2.98 | 191206260_PIT_SLN |
| Nap Rucker | LAN | 1.93 | 191206250_LAN_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Quinn | NYA | -2.31 | 191206262_NYA_OAK |
| Willie Mitchell | CLE | -1.68 | 191206250_DET_CLE |
| Bob Harmon | SLN | -1.62 | 191206252_PIT_SLN |
| King Cole | PIT | -1.36 | 191206252_PIT_SLN |
| Ralph Works | DET | -0.96 | 191206270_DET_CLE |
Based on accumulated WAA for this season up to 1912-06-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.43 | Rube Marquard | 142.3 | SFN |
| +002+ | 8.06 | Walter Johnson | 152 | MIN |
| +003+ | 6.52 | Slim Sallee | 139 | SLN |
| +004+ | 5.25 | Larry Cheney | 141.7 | CHN |
| +005+ | 4.81 | Christy Mathewson | 115.7 | SFN |
| +007+ | 4.72 | Marty O'Toole | 122 | PIT |
| +008+ | 4.58 | Rube Benton | 136 | CIN |
| +010+ | 4.3 | George Suggs | 113.7 | CIN |
| +011+ | 4.03 | Ed Walsh | 167.7 | CHA |
| +012+ | 3.89 | Joe Benz | 112.7 | CHA |
| +013+ | 3.76 | Lew Richie | 82.7 | CHN |
| +015+ | 3.64 | Claude Hendrix | 121.7 | PIT |
| +016+ | 3.6 | Nap Rucker | 111.7 | LAN |
| +019+ | 3.19 | Red Ames | 85.7 | SFN |
| +021+ | 2.91 | Ad Brennan | 106.3 | PHI |
| +024+ | 2.5 | Smoky Joe Wood | 158.3 | BOS |
| +025+ | 2.42 | Vean Gregg | 96.3 | CLE |
| +026+ | 2.4 | Chief Bender | 88.3 | OAK |
| +038+ | 1.94 | Bert Humphries | 67.7 | CIN |
| +039+ | 1.93 | Charley Hall | 99 | BOS |
| +040+ | 1.89 | Hub Perdue | 112.3 | ATL |
| +042+ | 1.84 | Hugh Bedient | 76.7 | BOS |
| +045+ | 1.8 | Howie Camnitz | 115.7 | PIT |
| +046+ | 1.8 | Jimmy Lavender | 75.3 | CHN |
| +050+ | 1.73 | Rube Geyer | 61.3 | SLN |
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