| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Gomez | NYA | 3.54 | 193109230_MIN_NYA |
| Heinie Meine | PIT | 2.86 | 193109220_PHI_PIT |
| Bill Hallahan | SLN | 2.76 | 193109210_LAN_SLN |
| Lloyd Brown | MIN | 2.11 | 193109230_MIN_NYA |
| Bob Smith | CHN | 1.48 | 193109210_SFN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Stew Bolen | PHI | -2.97 | 193109220_PHI_PIT |
| Chief Hogsett | DET | -2.52 | 193109211_DET_OAK |
| Sam Gray | BAL | -1.27 | 193109212_BAL_BOS |
| Socks Seibold | ATL | -1.18 | 193109210_ATL_CIN |
| Clint Brown | CLE | -1.15 | 193109232_CLE_DET |
Based on accumulated WAA for this season up to 1931-09-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 13.93 | Lefty Grove | 276.7 | OAK |
| +006+ | 10.27 | Bill Walker | 239.3 | SFN |
| +010+ | 8.28 | Carl Hubbell | 247 | SFN |
| +011+ | 7.82 | Freddie Fitzsimmons | 251 | SFN |
| +016+ | 6.95 | Lefty Gomez | 233.3 | NYA |
| +017+ | 6.93 | Heinie Meine | 275 | PIT |
| +018+ | 6.82 | Ed Brandt | 249.7 | ATL |
| +022+ | 5.61 | Lloyd Brown | 255.7 | MIN |
| +023+ | 5.52 | Larry French | 269 | PIT |
| +026+ | 4.96 | Ray Benge | 238 | PHI |
| +028+ | 4.7 | Watty Clark | 224.3 | LAN |
| +030+ | 4.54 | Bill Hallahan | 239.7 | SLN |
| +031+ | 4.42 | Syl Johnson | 176.7 | SLN |
| +034+ | 4.3 | Bob Smith | 235.3 | CHN |
| +039+ | 4.03 | Firpo Marberry | 216.7 | MIN |
| +040+ | 4.02 | Ray Kremer | 231 | PIT |
| +041+ | 3.95 | Larry Benton | 194.7 | CIN |
| +042+ | 3.92 | Bump Hadley | 175.3 | MIN |
| +044+ | 3.77 | George Earnshaw | 278 | OAK |
| +046+ | 3.74 | Dazzy Vance | 218.7 | LAN |
| +049+ | 3.5 | Red Lucas | 228.7 | CIN |
| +050+ | 3.49 | Jim Mooney | 71.7 | SFN |
| +051+ | 3.39 | Glenn Spencer | 180 | PIT |
| +055+ | 3.19 | Charlie Root | 245.7 | CHN |
| +059+ | 2.81 | Paul Derringer | 201.7 | SLN |
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