| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Hubbell | SFN | 6.17 | 193109201_SFN_CHN |
| Heinie Meine | PIT | 2.86 | 193109220_PHI_PIT |
| Bill Hallahan | SLN | 2.76 | 193109210_LAN_SLN |
| Bob Smith | CHN | 1.48 | 193109210_SFN_CHN |
| George Earnshaw | OAK | 1.34 | 193109220_DET_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Stew Bolen | PHI | -2.97 | 193109220_PHI_PIT |
| Chief Hogsett | DET | -2.52 | 193109211_DET_OAK |
| Hank Johnson | NYA | -1.72 | 193109201_CLE_NYA |
| Sam Gray | BAL | -1.27 | 193109212_BAL_BOS |
| Socks Seibold | ATL | -1.18 | 193109210_ATL_CIN |
Based on accumulated WAA for this season up to 1931-09-22.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 13.94 | Lefty Grove | 276.7 | OAK |
| +006+ | 10.28 | Bill Walker | 239.3 | SFN |
| +010+ | 8.28 | Carl Hubbell | 247 | SFN |
| +011+ | 7.83 | Freddie Fitzsimmons | 251 | SFN |
| +016+ | 6.94 | Heinie Meine | 275 | PIT |
| +017+ | 6.82 | Ed Brandt | 249.7 | ATL |
| +018+ | 6.52 | Lefty Gomez | 226.3 | NYA |
| +022+ | 5.53 | Larry French | 269 | PIT |
| +025+ | 5.17 | Lloyd Brown | 248.7 | MIN |
| +026+ | 4.97 | Ray Benge | 238 | PHI |
| +028+ | 4.71 | Watty Clark | 224.3 | LAN |
| +030+ | 4.55 | Bill Hallahan | 239.7 | SLN |
| +031+ | 4.43 | Syl Johnson | 176.7 | SLN |
| +034+ | 4.31 | Bob Smith | 235.3 | CHN |
| +039+ | 4.03 | Ray Kremer | 231 | PIT |
| +041+ | 3.95 | Larry Benton | 194.7 | CIN |
| +042+ | 3.92 | Bump Hadley | 175.3 | MIN |
| +044+ | 3.85 | Firpo Marberry | 214.7 | MIN |
| +045+ | 3.78 | George Earnshaw | 278 | OAK |
| +046+ | 3.75 | Dazzy Vance | 218.7 | LAN |
| +049+ | 3.5 | Red Lucas | 228.7 | CIN |
| +050+ | 3.49 | Jim Mooney | 71.7 | SFN |
| +051+ | 3.4 | Glenn Spencer | 180 | PIT |
| +055+ | 3.19 | Charlie Root | 245.7 | CHN |
| +059+ | 2.82 | Paul Derringer | 201.7 | SLN |
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