| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walter Johnson | MIN | 9.51 | 191208160_CHA_MIN |
| Christy Mathewson | SFN | 5.58 | 191208170_SFN_CHN |
| Claude Hendrix | PIT | 3.67 | 191208160_PHI_PIT |
| Nap Rucker | LAN | 3.51 | 191208160_LAN_CIN |
| Ed Walsh | CHA | 1.9 | 191208170_CHA_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ralph Works | DET | -3.57 | 191208160_DET_NYA |
| Earl Hamilton | BAL | -1.14 | 191208160_BAL_BOS |
| Ray Caldwell | NYA | -1.14 | 191208172_BAL_NYA |
| Bob Groom | MIN | -0.96 | 191208170_CLE_MIN |
| Otto Hess | ATL | -0.88 | 191208172_ATL_SLN |
Based on accumulated WAA for this season up to 1912-08-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 13.38 | Walter Johnson | 275.3 | MIN |
| +002+ | 9.69 | Christy Mathewson | 227 | SFN |
| +003+ | 9.15 | Rube Marquard | 225.7 | SFN |
| +005+ | 8.6 | Nap Rucker | 212.7 | LAN |
| +006+ | 8.35 | Claude Hendrix | 230.7 | PIT |
| +007+ | 7.67 | Slim Sallee | 228.7 | SLN |
| +008+ | 7.6 | Marty O'Toole | 213.3 | PIT |
| +010+ | 6.66 | Smoky Joe Wood | 258 | BOS |
| +011+ | 6.18 | Pete Alexander | 231 | PHI |
| +013+ | 5.8 | Ed Walsh | 299 | CHA |
| +014+ | 5.77 | Rube Benton | 217 | CIN |
| +017+ | 4.89 | Jimmy Lavender | 180.3 | CHN |
| +018+ | 4.76 | Art Fromme | 199.7 | CIN |
| +019+ | 4.75 | Lew Richie | 185.7 | CHN |
| +020+ | 4.61 | George Suggs | 207 | CIN |
| +023+ | 4.41 | Jeff Tesreau | 134.7 | SFN |
| +025+ | 4.36 | Larry Cheney | 211 | CHN |
| +027+ | 4.07 | Howie Camnitz | 204.7 | PIT |
| +032+ | 3.5 | Red Ames | 131.7 | SFN |
| +034+ | 3.44 | Earl Moore | 138 | PHI |
| +036+ | 3.32 | Hank Robinson | 118.7 | PIT |
| +037+ | 3.28 | Eddie Plank | 191.7 | OAK |
| +043+ | 2.95 | Bert Humphries | 149.3 | CIN |
| +044+ | 2.93 | Jean Dubuc | 211.7 | DET |
| +046+ | 2.88 | Hooks Wiltse | 109.3 | SFN |
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