| Starter | Tm | Tier | Game |
|---|---|---|---|
| Slim Sallee | SLN | 2.91 | 191208310_SLN_CHN |
| Ed Walsh | CHA | 2.23 | 191209010_DET_CHA |
| Rube Benton | CIN | 1.74 | 191208300_CIN_PIT |
| Jimmy Lavender | CHN | 1.07 | 191208310_SLN_CHN |
| Howie Camnitz | PIT | 1.01 | 191209011_PIT_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| King Cole | PIT | -2.73 | 191209012_PIT_CIN |
| Mack Allison | BAL | -2.22 | 191208310_BAL_DET |
| Carl Cashion | MIN | -1.74 | 191208310_NYA_MIN |
| Eddie Cicotte | CHA | -1.36 | 191208310_CHA_CLE |
| Ray Caldwell | NYA | -1.25 | 191208310_NYA_MIN |
Based on accumulated WAA for this season up to 1912-09-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 14.16 | Walter Johnson | 304.7 | MIN |
| +002+ | 10.22 | Christy Mathewson | 244 | SFN |
| +003+ | 9 | Nap Rucker | 230 | LAN |
| +004+ | 8.51 | Slim Sallee | 262.7 | SLN |
| +006+ | 8.42 | Rube Marquard | 242.7 | SFN |
| +009+ | 7.32 | Smoky Joe Wood | 285 | BOS |
| +010+ | 6.85 | Rube Benton | 247.7 | CIN |
| +011+ | 6.67 | Art Fromme | 227.7 | CIN |
| +015+ | 6.24 | George Suggs | 234.3 | CIN |
| +017+ | 6.01 | Ed Walsh | 330 | CHA |
| +018+ | 5.93 | Marty O'Toole | 230 | PIT |
| +019+ | 5.6 | Howie Camnitz | 233.3 | PIT |
| +020+ | 5.56 | Larry Cheney | 238 | CHN |
| +021+ | 5.42 | Lew Richie | 199.7 | CHN |
| +022+ | 5.29 | Jimmy Lavender | 214.3 | CHN |
| +023+ | 4.93 | Jeff Tesreau | 159.7 | SFN |
| +030+ | 4.13 | Eppa Rixey | 115.7 | PHI |
| +031+ | 4.07 | Red Ames | 141.3 | SFN |
| +036+ | 3.44 | Babe Adams | 135.3 | PIT |
| +038+ | 3.27 | Ray Collins | 146.3 | BOS |
| +041+ | 3.25 | Hooks Wiltse | 125.7 | SFN |
| +046+ | 3.04 | Eddie Plank | 204.7 | OAK |
| +056+ | 2.53 | Earl Moore | 159 | PHI |
| +058+ | 2.4 | Rube Geyer | 139.7 | SLN |
| +063+ | 2.2 | Lefty Leifield | 91 | TOT |
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