| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Hubbell | SFN | 5.65 | 193108010_ATL_SFN |
| Dazzy Vance | LAN | 2.28 | 193107310_LAN_PHI |
| Ray Kremer | PIT | 1.79 | 193107310_CIN_PIT |
| Bill Hallahan | SLN | 1.42 | 193107310_CHN_SLN |
| Rube Walberg | OAK | 1.02 | 193108010_OAK_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Guy Bush | CHN | -2.76 | 193107310_CHN_SLN |
| Waite Hoyt | OAK | -2.46 | 193107300_BAL_OAK |
| Vic Frazier | CHA | -1.19 | 193108010_CHA_DET |
| Hank Johnson | NYA | -0.64 | 193108010_NYA_BOS |
| Carl Fischer | MIN | -0.56 | 193107300_CLE_MIN |
Based on accumulated WAA for this season up to 1931-08-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 9.19 | Lefty Grove | 189 | OAK |
| +008+ | 5.59 | Carl Hubbell | 159.7 | SFN |
| +010+ | 5.33 | Ed Brandt | 160.7 | ATL |
| +013+ | 4.96 | Freddie Fitzsimmons | 170.3 | SFN |
| +014+ | 4.59 | Ray Kremer | 176.3 | PIT |
| +015+ | 4.56 | Tom Zachary | 133.3 | ATL |
| +017+ | 4.52 | Charlie Root | 161.3 | CHN |
| +019+ | 4.42 | Lloyd Brown | 172.3 | MIN |
| +021+ | 4.33 | Ray Benge | 168.7 | PHI |
| +023+ | 4.1 | Si Johnson | 179 | CIN |
| +026+ | 3.81 | Bill Walker | 139.3 | SFN |
| +027+ | 3.55 | Larry French | 187.3 | PIT |
| +028+ | 3.5 | Dazzy Vance | 145 | LAN |
| +029+ | 3.37 | Watty Clark | 143.7 | LAN |
| +031+ | 3.31 | Bill Hallahan | 151.7 | SLN |
| +033+ | 3.16 | Lefty Gomez | 138 | NYA |
| +032+ | 3.16 | Heinie Meine | 168 | PIT |
| +034+ | 3.09 | Rube Walberg | 204 | OAK |
| +037+ | 2.85 | George Earnshaw | 208 | OAK |
| +038+ | 2.49 | Bump Hadley | 108.7 | MIN |
| +041+ | 2.41 | Firpo Marberry | 129.7 | MIN |
| +048+ | 2.24 | Jack Ogden | 68.3 | CIN |
| +052+ | 2.12 | Syl Johnson | 126.7 | SLN |
| +051+ | 2.12 | George Uhle | 137 | DET |
| +054+ | 2.03 | Sam Jones | 112.7 | MIN |
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