| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 16.8 | 193109270_OAK_NYA |
| Freddie Fitzsimmons | SFN | 4.77 | 193109270_SFN_LAN |
| Lefty Gomez | NYA | 3.83 | 193109261_MIN_NYA |
| Heinie Meine | PIT | 3.53 | 193109271_PIT_CHN |
| Lloyd Brown | MIN | 2.35 | 193109262_MIN_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Russell | BOS | -3.78 | 193109270_BOS_MIN |
| Sam Gray | BAL | -2.41 | 193109271_CHA_BAL |
| Tommy Thomas | CHA | -1.38 | 193109261_CHA_BAL |
| Tommy Bridges | DET | -1.37 | 193109260_DET_CLE |
| Red Ruffing | NYA | -0.69 | 193109262_MIN_NYA |
Based on accumulated WAA for this season up to 1931-09-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 13.65 | Lefty Grove | 288.7 | OAK |
| +006+ | 10.31 | Bill Walker | 239.3 | SFN |
| +009+ | 8.32 | Carl Hubbell | 247 | SFN |
| +014+ | 7.41 | Lefty Gomez | 242.3 | NYA |
| +015+ | 7.12 | Heinie Meine | 283 | PIT |
| +017+ | 6.84 | Ed Brandt | 249.7 | ATL |
| +018+ | 6.23 | Freddie Fitzsimmons | 253.7 | SFN |
| +022+ | 5.66 | Ray Benge | 247 | PHI |
| +024+ | 5.25 | Tom Zachary | 228.7 | ATL |
| +025+ | 5.2 | Larry French | 276 | PIT |
| +028+ | 4.96 | Watty Clark | 233.3 | LAN |
| +029+ | 4.93 | Lloyd Brown | 258.7 | MIN |
| +030+ | 4.71 | Bob Smith | 239.3 | CHN |
| +032+ | 4.67 | Syl Johnson | 185.7 | SLN |
| +033+ | 4.58 | Bill Hallahan | 248.7 | SLN |
| +038+ | 4.18 | Bump Hadley | 179.7 | MIN |
| +039+ | 4.08 | Ray Kremer | 231 | PIT |
| +042+ | 4 | Larry Benton | 203.7 | CIN |
| +043+ | 3.76 | Dazzy Vance | 218.7 | LAN |
| +048+ | 3.5 | Jim Mooney | 71.7 | SFN |
| +051+ | 3.48 | Paul Derringer | 210.7 | SLN |
| +052+ | 3.48 | Charlie Root | 250.7 | CHN |
| +050+ | 3.48 | Firpo Marberry | 219 | MIN |
| +053+ | 3.34 | Red Lucas | 237.7 | CIN |
| +061+ | 2.78 | Glenn Spencer | 186.3 | PIT |
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