| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Hubbell | SFN | 4.82 | 193107191_SFN_SLN |
| Watty Clark | LAN | 3.94 | 193107200_LAN_CHN |
| Charlie Root | CHN | 2.64 | 193107200_LAN_CHN |
| George Earnshaw | OAK | 2.4 | 193107181_CHA_OAK |
| Lloyd Brown | MIN | 1.61 | 193107190_DET_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Phil Collins | PHI | -1.61 | 193107192_PHI_CIN |
| Jack Russell | BOS | -1.14 | 193107190_CLE_BOS |
| Paul Derringer | SLN | -1.02 | 193107192_SFN_SLN |
| Art Herring | DET | -0.93 | 193107190_DET_MIN |
| Ben Cantwell | ATL | -0.66 | 193107182_ATL_PIT |
Based on accumulated WAA for this season up to 1931-07-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 8.77 | Lefty Grove | 178 | OAK |
| +012+ | 4.59 | Watty Clark | 127.7 | LAN |
| +013+ | 4.3 | Freddie Fitzsimmons | 149.7 | SFN |
| +015+ | 4.25 | Ed Brandt | 141.7 | ATL |
| +017+ | 4.17 | Lloyd Brown | 166.7 | MIN |
| +018+ | 3.89 | Tom Zachary | 116.7 | ATL |
| +019+ | 3.84 | Ray Benge | 150.7 | PHI |
| +020+ | 3.79 | Bill Walker | 119 | SFN |
| +021+ | 3.71 | Charlie Root | 143.3 | CHN |
| +024+ | 3.52 | Carl Hubbell | 129 | SFN |
| +025+ | 3.43 | Dazzy Vance | 128.7 | LAN |
| +026+ | 3.42 | Heinie Meine | 158 | PIT |
| +027+ | 3.41 | Bill Hallahan | 138.7 | SLN |
| +028+ | 3.4 | Ray Kremer | 151.3 | PIT |
| +029+ | 3.29 | Si Johnson | 159 | CIN |
| +033+ | 2.59 | George Earnshaw | 190 | OAK |
| +037+ | 2.33 | Jack Ogden | 60.3 | CIN |
| +043+ | 2.21 | Rube Walberg | 175.3 | OAK |
| +047+ | 2.06 | Bob Smith | 135 | CHN |
| +049+ | 1.96 | Lefty Gomez | 119.7 | NYA |
| +051+ | 1.9 | Jack Berly | 85 | SFN |
| +055+ | 1.82 | Firpo Marberry | 107.7 | MIN |
| +059+ | 1.71 | Bump Hadley | 95.7 | MIN |
| +062+ | 1.69 | Sam Jones | 97.7 | MIN |
| +064+ | 1.64 | Bruce Cunningham | 87.3 | ATL |
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