| Starter | Tm | Tier | Game |
|---|---|---|---|
| Nap Rucker | LAN | 4.62 | 191209281_PHI_LAN |
| Jeff Tesreau | SFN | 3.43 | 191209281_ATL_SFN |
| Ed Walsh | CHA | 1.95 | 191209290_BAL_CHA |
| Howie Camnitz | PIT | 1.73 | 191209280_SLN_PIT |
| George Suggs | CIN | 1.54 | 191209272_CIN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Russ Ford | NYA | -3.72 | 191209282_NYA_OAK |
| Ralph Works | CIN | -3.62 | 191209280_CIN_CHN |
| Joe Lake | DET | -2.76 | 191209290_DET_CLE |
| George Kahler | CLE | -1.8 | 191209280_DET_CLE |
| Boardwalk Brown | OAK | -1.75 | 191209281_NYA_OAK |
Based on accumulated WAA for this season up to 1912-09-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 14.45 | Walter Johnson | 360.3 | MIN |
| +002+ | 12.62 | Christy Mathewson | 310 | SFN |
| +003+ | 11.38 | Nap Rucker | 286.3 | LAN |
| +005+ | 9.97 | Jeff Tesreau | 231.7 | SFN |
| +006+ | 9.85 | Smoky Joe Wood | 336 | BOS |
| +009+ | 8.19 | Ed Walsh | 381.7 | CHA |
| +010+ | 8.04 | Pete Alexander | 303 | PHI |
| +012+ | 7.86 | Art Fromme | 282.7 | CIN |
| +013+ | 7.81 | Marty O'Toole | 271.3 | PIT |
| +015+ | 7.69 | Claude Hendrix | 279.3 | PIT |
| +016+ | 7.66 | Larry Cheney | 288.3 | CHN |
| +019+ | 6.62 | Howie Camnitz | 267.3 | PIT |
| +020+ | 6.49 | George Suggs | 290.7 | CIN |
| +021+ | 6.15 | Hank Robinson | 175 | PIT |
| +026+ | 5.83 | Rube Benton | 292.7 | CIN |
| +027+ | 5.69 | Eppa Rixey | 156 | PHI |
| +029+ | 5.25 | Lew Richie | 238.7 | CHN |
| +032+ | 4.93 | Eddie Plank | 259.7 | OAK |
| +035+ | 4.64 | Ray Collins | 191.3 | BOS |
| +038+ | 4.25 | Vean Gregg | 271 | CLE |
| +049+ | 3.08 | Tom Seaton | 244.3 | PHI |
| +059+ | 2.62 | Earl Moore | 182 | PHI |
| +062+ | 2.53 | Rube Geyer | 178.3 | SLN |
| +070+ | 2.08 | Buck O'Brien | 257.7 | BOS |
| +078+ | 1.7 | Eddie Stack | 138.7 | LAN |
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