| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 5.64 | 193107112_SFN_PHI |
| Watty Clark | LAN | 3.35 | 193107090_LAN_ATL |
| Tom Zachary | ATL | 3.3 | 193107090_LAN_ATL |
| Rube Walberg | OAK | 2 | 193107100_OAK_NYA |
| George Uhle | DET | 1.94 | 193107111_BAL_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Les Sweetland | CHN | -2.61 | 193107111_CHN_PIT |
| Vic Frazier | CHA | -2.52 | 193107090_CLE_CHA |
| Sam Gray | BAL | -1.28 | 193107090_BAL_DET |
| Red Ruffing | NYA | -1.22 | 193107110_OAK_NYA |
| Ray Kolp | CIN | -0.83 | 193107110_CIN_SLN |
Based on accumulated WAA for this season up to 1931-07-11.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 7.69 | Lefty Grove | 161 | OAK |
| +010+ | 4.73 | Freddie Fitzsimmons | 135.7 | SFN |
| +013+ | 3.78 | Watty Clark | 110.7 | LAN |
| +015+ | 3.64 | Lloyd Brown | 153 | MIN |
| +014+ | 3.64 | Ed Brandt | 133.7 | ATL |
| +019+ | 3.41 | Tom Zachary | 107.7 | ATL |
| +020+ | 3.33 | Bill Hallahan | 123 | SLN |
| +021+ | 3.31 | George Earnshaw | 172 | OAK |
| +022+ | 3.29 | Ray Benge | 135.7 | PHI |
| +026+ | 2.91 | Heinie Meine | 139.7 | PIT |
| +027+ | 2.81 | Carl Hubbell | 114 | SFN |
| +029+ | 2.75 | Bill Walker | 107 | SFN |
| +030+ | 2.72 | Dazzy Vance | 112.7 | LAN |
| +032+ | 2.71 | Ray Kremer | 133.3 | PIT |
| +031+ | 2.71 | Charlie Root | 120.3 | CHN |
| +036+ | 2.6 | Bump Hadley | 85.7 | MIN |
| +037+ | 2.49 | Si Johnson | 142 | CIN |
| +038+ | 2.44 | Bob Smith | 128.3 | CHN |
| +039+ | 2.29 | Frank Watt | 68 | PHI |
| +040+ | 2.19 | Rube Walberg | 158.3 | OAK |
| +046+ | 1.89 | Jack Ogden | 45.3 | CIN |
| +047+ | 1.88 | Fred Frankhouse | 70.7 | ATL |
| +049+ | 1.86 | Jack Berly | 68 | SFN |
| +050+ | 1.83 | George Uhle | 110.3 | DET |
| +057+ | 1.71 | Clarence Mitchell | 122 | SFN |
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