| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 16.35 | 193109240_BOS_OAK |
| Lefty Gomez | NYA | 3.54 | 193109230_MIN_NYA |
| Larry French | PIT | 2.18 | 193109240_PHI_PIT |
| Lloyd Brown | MIN | 2.11 | 193109230_MIN_NYA |
| Wilcy Moore | BOS | 0.09 | 193109240_BOS_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Clint Brown | CLE | -1.15 | 193109232_CLE_DET |
| Jumbo Elliott | PHI | -0.31 | 193109240_PHI_PIT |
| Herb Pennock | NYA | -0.27 | 193109250_MIN_NYA |
| Lew Krausse | OAK | -0.17 | 193109250_BOS_OAK |
| Ed Durham | BOS | -0.08 | 193109250_BOS_OAK |
Based on accumulated WAA for this season up to 1931-09-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 14.35 | Lefty Grove | 285.7 | OAK |
| +006+ | 10.26 | Bill Walker | 239.3 | SFN |
| +010+ | 8.27 | Carl Hubbell | 247 | SFN |
| +012+ | 7.81 | Freddie Fitzsimmons | 251 | SFN |
| +016+ | 6.95 | Lefty Gomez | 233.3 | NYA |
| +017+ | 6.92 | Heinie Meine | 275 | PIT |
| +018+ | 6.8 | Ed Brandt | 249.7 | ATL |
| +022+ | 5.62 | Lloyd Brown | 255.7 | MIN |
| +025+ | 5.12 | Larry French | 276 | PIT |
| +026+ | 4.95 | Ray Benge | 238 | PHI |
| +028+ | 4.69 | Watty Clark | 224.3 | LAN |
| +029+ | 4.53 | Bill Hallahan | 239.7 | SLN |
| +031+ | 4.42 | Syl Johnson | 176.7 | SLN |
| +035+ | 4.29 | Bob Smith | 235.3 | CHN |
| +037+ | 4.1 | Firpo Marberry | 217.3 | MIN |
| +040+ | 4.01 | Ray Kremer | 231 | PIT |
| +042+ | 3.94 | Larry Benton | 194.7 | CIN |
| +043+ | 3.92 | Bump Hadley | 175.3 | MIN |
| +045+ | 3.75 | George Earnshaw | 278 | OAK |
| +046+ | 3.73 | Dazzy Vance | 218.7 | LAN |
| +050+ | 3.49 | Red Lucas | 228.7 | CIN |
| +049+ | 3.49 | Jim Mooney | 71.7 | SFN |
| +051+ | 3.39 | Glenn Spencer | 180 | PIT |
| +055+ | 3.18 | Charlie Root | 245.7 | CHN |
| +059+ | 2.8 | Paul Derringer | 201.7 | SLN |
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