| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 16.12 | 193107080_OAK_MIN |
| Freddie Fitzsimmons | SFN | 4.76 | 193107080_SFN_PHI |
| Watty Clark | LAN | 3.35 | 193107090_LAN_ATL |
| Tom Zachary | ATL | 3.3 | 193107090_LAN_ATL |
| Charlie Root | CHN | 2.57 | 193107071_SLN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Vic Frazier | CHA | -2.52 | 193107090_CLE_CHA |
| Guy Bush | CHN | -1.36 | 193107072_SLN_CHN |
| Stew Bolen | PHI | -1.3 | 193107070_LAN_PHI |
| Sam Gray | BAL | -1.28 | 193107090_BAL_DET |
| Paul Derringer | SLN | -0.69 | 193107092_CIN_SLN |
Based on accumulated WAA for this season up to 1931-07-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 7.75 | Lefty Grove | 161 | OAK |
| +009+ | 4.69 | Freddie Fitzsimmons | 135.7 | SFN |
| +013+ | 3.73 | Watty Clark | 110.7 | LAN |
| +015+ | 3.43 | Ray Benge | 126.7 | PHI |
| +017+ | 3.39 | Tom Zachary | 107.7 | ATL |
| +018+ | 3.37 | Ed Brandt | 124.7 | ATL |
| +019+ | 3.31 | Bill Hallahan | 123 | SLN |
| +021+ | 3.17 | Bill Walker | 98.7 | SFN |
| +022+ | 3.09 | Heinie Meine | 139.7 | PIT |
| +024+ | 3.01 | George Earnshaw | 164 | OAK |
| +025+ | 2.95 | Lloyd Brown | 144 | MIN |
| +027+ | 2.89 | Ray Kremer | 133.3 | PIT |
| +028+ | 2.86 | Charlie Root | 120.3 | CHN |
| +029+ | 2.78 | Carl Hubbell | 114 | SFN |
| +030+ | 2.76 | Dazzy Vance | 105 | LAN |
| +034+ | 2.61 | Bob Smith | 128.3 | CHN |
| +035+ | 2.5 | Rube Walberg | 152.3 | OAK |
| +036+ | 2.48 | Bump Hadley | 84.7 | MIN |
| +038+ | 2.43 | Si Johnson | 142 | CIN |
| +040+ | 2.28 | Frank Watt | 68 | PHI |
| +043+ | 2.17 | George Uhle | 101.3 | DET |
| +046+ | 1.84 | Jack Berly | 68 | SFN |
| +049+ | 1.73 | Clarence Mitchell | 114 | SFN |
| +052+ | 1.68 | Jack Ogden | 39.3 | CIN |
| +057+ | 1.61 | Socks Seibold | 111 | ATL |
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