| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 4.51 | 193107290_SFN_PIT |
| Dazzy Vance | LAN | 2.28 | 193107310_LAN_PHI |
| Ray Kremer | PIT | 1.79 | 193107310_CIN_PIT |
| Firpo Marberry | MIN | 1.7 | 193107290_CLE_MIN |
| Ed Brandt | ATL | 1.69 | 193107290_ATL_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Guy Bush | CHN | -2.76 | 193107310_CHN_SLN |
| Waite Hoyt | OAK | -2.46 | 193107300_BAL_OAK |
| Jack Russell | BOS | -2.21 | 193107291_DET_BOS |
| Chief Hogsett | DET | -1.28 | 193107292_DET_BOS |
| Carl Fischer | MIN | -0.56 | 193107300_CLE_MIN |
Based on accumulated WAA for this season up to 1931-07-31.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 9.23 | Lefty Grove | 189 | OAK |
| +009+ | 5.36 | Ed Brandt | 160.7 | ATL |
| +011+ | 5.02 | Freddie Fitzsimmons | 170.3 | SFN |
| +013+ | 4.92 | Ray Benge | 167.7 | PHI |
| +014+ | 4.76 | Carl Hubbell | 150.7 | SFN |
| +015+ | 4.65 | Ray Kremer | 176.3 | PIT |
| +017+ | 4.59 | Tom Zachary | 133.3 | ATL |
| +018+ | 4.57 | Charlie Root | 161.3 | CHN |
| +019+ | 4.47 | Lloyd Brown | 172.3 | MIN |
| +023+ | 4.14 | Si Johnson | 179 | CIN |
| +026+ | 3.85 | Bill Walker | 139.3 | SFN |
| +027+ | 3.61 | Larry French | 187.3 | PIT |
| +028+ | 3.55 | Dazzy Vance | 145 | LAN |
| +030+ | 3.34 | Bill Hallahan | 151.7 | SLN |
| +031+ | 3.33 | Watty Clark | 140.7 | LAN |
| +032+ | 3.21 | Heinie Meine | 168 | PIT |
| +033+ | 3.19 | Lefty Gomez | 138 | NYA |
| +035+ | 2.89 | George Earnshaw | 208 | OAK |
| +037+ | 2.77 | Rube Walberg | 196 | OAK |
| +038+ | 2.52 | Bump Hadley | 108.7 | MIN |
| +047+ | 2.25 | Jack Ogden | 68.3 | CIN |
| +048+ | 2.17 | George Uhle | 137 | DET |
| +050+ | 2.07 | Sam Jones | 112.7 | MIN |
| +054+ | 1.99 | Syl Johnson | 118.7 | SLN |
| +060+ | 1.9 | Red Lucas | 148.3 | CIN |
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