| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ed Walsh | CHA | 6.98 | 191206250_BAL_CHA |
| Rube Marquard | SFN | 6.71 | 191206250_PHI_SFN |
| Slim Sallee | SLN | 3.79 | 191206230_SLN_CHN |
| Chief Bender | OAK | 2.53 | 191206240_NYA_OAK |
| Nap Rucker | LAN | 1.93 | 191206250_LAN_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Willie Mitchell | CLE | -1.68 | 191206250_DET_CLE |
| Bob Harmon | SLN | -1.62 | 191206252_PIT_SLN |
| King Cole | PIT | -1.36 | 191206252_PIT_SLN |
| Barney Pelty | MIN | -1.24 | 191206240_BOS_MIN |
| Ed Reulbach | CHN | -0.77 | 191206240_CHN_CIN |
Based on accumulated WAA for this season up to 1912-06-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.55 | Rube Marquard | 142.3 | SFN |
| +003+ | 6.04 | Slim Sallee | 130 | SLN |
| +004+ | 5.37 | Larry Cheney | 141.7 | CHN |
| +005+ | 4.92 | Christy Mathewson | 115.7 | SFN |
| +006+ | 4.66 | Rube Benton | 127 | CIN |
| +009+ | 4.23 | Marty O'Toole | 113 | PIT |
| +010+ | 4.18 | Ed Walsh | 167.7 | CHA |
| +011+ | 4.16 | Nap Rucker | 110 | LAN |
| +012+ | 3.83 | Claude Hendrix | 121.7 | PIT |
| +014+ | 3.63 | George Suggs | 105.7 | CIN |
| +017+ | 3.13 | Joe Benz | 103.7 | CHA |
| +019+ | 2.98 | Hooks Wiltse | 61 | SFN |
| +018+ | 2.98 | Ad Brennan | 98 | PHI |
| +020+ | 2.96 | Lew Richie | 73.7 | CHN |
| +021+ | 2.75 | Charley Hall | 96 | BOS |
| +025+ | 2.51 | Vean Gregg | 96.3 | CLE |
| +026+ | 2.41 | Chief Bender | 85.3 | OAK |
| +027+ | 2.34 | Cliff Curtis | 46 | PHI |
| +029+ | 2.24 | Eddie Plank | 102.7 | OAK |
| +036+ | 2.01 | Hub Perdue | 112.3 | ATL |
| +037+ | 2 | Bert Humphries | 67.7 | CIN |
| +038+ | 1.89 | Hugh Bedient | 76.7 | BOS |
| +040+ | 1.86 | Jimmy Lavender | 75.3 | CHN |
| +046+ | 1.72 | Howie Camnitz | 106.7 | PIT |
| +047+ | 1.71 | Smoky Joe Wood | 149.3 | BOS |
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