| Starter | Tm | Tier | Game |
|---|---|---|---|
| Christy Mathewson | SFN | 6.9 | 191209261_ATL_SFN |
| Nap Rucker | LAN | 4.62 | 191209281_PHI_LAN |
| Art Fromme | CIN | 2.69 | 191209261_CIN_CHN |
| Pete Alexander | PHI | 1.77 | 191209261_PHI_LAN |
| Larry Cheney | CHN | 1.77 | 191209262_CIN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Russ Ford | NYA | -3.72 | 191209282_NYA_OAK |
| Ralph Works | CIN | -3.62 | 191209280_CIN_CHN |
| George Kahler | CLE | -1.8 | 191209280_DET_CLE |
| Boardwalk Brown | OAK | -1.75 | 191209281_NYA_OAK |
| Mack Allison | BAL | -1.51 | 191209271_CHA_BAL |
Based on accumulated WAA for this season up to 1912-09-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 14.46 | Walter Johnson | 360.3 | MIN |
| +002+ | 12.63 | Christy Mathewson | 310 | SFN |
| +003+ | 11.39 | Nap Rucker | 286.3 | LAN |
| +005+ | 9.98 | Jeff Tesreau | 231.7 | SFN |
| +006+ | 9.87 | Smoky Joe Wood | 336 | BOS |
| +009+ | 8.05 | Pete Alexander | 303 | PHI |
| +011+ | 7.85 | Art Fromme | 282.7 | CIN |
| +013+ | 7.69 | Claude Hendrix | 279.3 | PIT |
| +014+ | 7.67 | Larry Cheney | 288.3 | CHN |
| +015+ | 7.4 | Ed Walsh | 372.7 | CHA |
| +018+ | 7.02 | Marty O'Toole | 262.3 | PIT |
| +019+ | 6.62 | Howie Camnitz | 267.3 | PIT |
| +020+ | 6.48 | George Suggs | 290.7 | CIN |
| +021+ | 6.21 | Rube Benton | 287.7 | CIN |
| +022+ | 6.16 | Hank Robinson | 175 | PIT |
| +025+ | 5.97 | Red Ames | 168.7 | SFN |
| +027+ | 5.7 | Eppa Rixey | 156 | PHI |
| +031+ | 4.94 | Eddie Plank | 259.7 | OAK |
| +035+ | 4.65 | Ray Collins | 191.3 | BOS |
| +036+ | 4.55 | Jimmy Lavender | 247 | CHN |
| +041+ | 3.65 | Vean Gregg | 262 | CLE |
| +049+ | 3.09 | Tom Seaton | 244.3 | PHI |
| +060+ | 2.63 | Earl Moore | 182 | PHI |
| +063+ | 2.54 | Rube Geyer | 178.3 | SLN |
| +069+ | 2.09 | Buck O'Brien | 257.7 | BOS |
_