| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 15.4 | 193108231_OAK_BAL |
| Carl Hubbell | SFN | 4.95 | 193108251_CHN_SFN |
| Ed Brandt | ATL | 4.56 | 193108232_SLN_ATL |
| Ray Kremer | PIT | 2.61 | 193108252_PIT_LAN |
| Lefty Gomez | NYA | 2.24 | 193108240_NYA_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Waite Hoyt | OAK | -2.64 | 193108232_OAK_BAL |
| Red Ruffing | NYA | -1.6 | 193108231_NYA_CHA |
| Chief Hogsett | DET | -1.39 | 193108240_MIN_DET |
| Spades Wood | PIT | -1.19 | 193108232_PIT_LAN |
| Guy Bush | CHN | -1.08 | 193108242_CHN_SFN |
Based on accumulated WAA for this season up to 1931-08-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 11.82 | Lefty Grove | 235.3 | OAK |
| +008+ | 8.16 | Ed Brandt | 209.7 | ATL |
| +009+ | 7.53 | Bill Walker | 190 | SFN |
| +011+ | 6.67 | Carl Hubbell | 200.7 | SFN |
| +013+ | 6.21 | Freddie Fitzsimmons | 215.3 | SFN |
| +016+ | 5.43 | Ray Kremer | 209.3 | PIT |
| +017+ | 5.3 | Ray Benge | 208.7 | PHI |
| +019+ | 5.12 | Si Johnson | 225.7 | CIN |
| +018+ | 5.12 | Tom Zachary | 173.7 | ATL |
| +023+ | 4.91 | Lloyd Brown | 208.7 | MIN |
| +024+ | 4.89 | Lefty Gomez | 184.3 | NYA |
| +025+ | 4.82 | Larry French | 231.3 | PIT |
| +027+ | 4.38 | Bill Hallahan | 188.7 | SLN |
| +032+ | 3.86 | Watty Clark | 182.7 | LAN |
| +033+ | 3.84 | Dazzy Vance | 184.7 | LAN |
| +037+ | 3.46 | Charlie Root | 202.7 | CHN |
| +039+ | 3.44 | Heinie Meine | 217 | PIT |
| +040+ | 3.3 | George Earnshaw | 236.3 | OAK |
| +041+ | 3.3 | Bob Smith | 196.7 | CHN |
| +044+ | 3.07 | Larry Benton | 152.7 | CIN |
| +046+ | 2.85 | Glenn Spencer | 136.7 | PIT |
| +047+ | 2.82 | Fred Heimach | 111.3 | LAN |
| +048+ | 2.82 | Jesse Haines | 107.3 | SLN |
| +049+ | 2.78 | Firpo Marberry | 169 | MIN |
| +052+ | 2.64 | Rube Walberg | 236 | OAK |
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