| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walter Johnson | MIN | 10.23 | 191207130_CHA_MIN |
| Rube Marquard | SFN | 5.49 | 191207142_SFN_SLN |
| Slim Sallee | SLN | 3.67 | 191207150_SFN_SLN |
| Nap Rucker | LAN | 3.01 | 191207131_LAN_PIT |
| Marty O'Toole | PIT | 2.29 | 191207132_LAN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| George McConnell | NYA | -3.08 | 191207131_BAL_NYA |
| Ralph Works | DET | -2.04 | 191207150_DET_BOS |
| Elmer Knetzer | LAN | -1.68 | 191207132_LAN_PIT |
| Bob Harmon | SLN | -1.03 | 191207141_SFN_SLN |
| Mack Allison | BAL | -1.03 | 191207131_BAL_NYA |
Based on accumulated WAA for this season up to 1912-07-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.85 | Walter Johnson | 199 | MIN |
| +002+ | 8.71 | Rube Marquard | 173.7 | SFN |
| +003+ | 7.05 | Slim Sallee | 172.7 | SLN |
| +004+ | 6.77 | Christy Mathewson | 155.7 | SFN |
| +005+ | 6.76 | Marty O'Toole | 159 | PIT |
| +006+ | 6.41 | Nap Rucker | 149.7 | LAN |
| +007+ | 5.8 | Claude Hendrix | 164.3 | PIT |
| +010+ | 5.05 | Ed Walsh | 208.7 | CHA |
| +011+ | 5 | Jimmy Lavender | 122 | CHN |
| +012+ | 4.98 | Rube Benton | 165.3 | CIN |
| +014+ | 4.89 | Larry Cheney | 172 | CHN |
| +015+ | 4.77 | Smoky Joe Wood | 194.3 | BOS |
| +017+ | 4.56 | George Suggs | 141.3 | CIN |
| +020+ | 3.7 | Joe Benz | 136.7 | CHA |
| +024+ | 3.03 | Pete Alexander | 148.7 | PHI |
| +027+ | 2.97 | Red Ames | 103 | SFN |
| +028+ | 2.9 | Charley Hall | 127.3 | BOS |
| +030+ | 2.77 | Hooks Wiltse | 90 | SFN |
| +031+ | 2.72 | Ad Brennan | 132.7 | PHI |
| +033+ | 2.66 | Bert Humphries | 99.7 | CIN |
| +038+ | 2.55 | Vean Gregg | 130.3 | CLE |
| +039+ | 2.51 | Art Fromme | 139.7 | CIN |
| +043+ | 2.24 | Rube Geyer | 85 | SLN |
| +045+ | 2.2 | Hub Perdue | 130.3 | ATL |
| +044+ | 2.2 | Chief Bender | 113.3 | OAK |
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