| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 5.38 | 193107050_SFN_LAN |
| George Earnshaw | OAK | 3.31 | 193107070_OAK_MIN |
| Charlie Root | CHN | 2.57 | 193107071_SLN_CHN |
| Bill Hallahan | SLN | 1.52 | 193107071_SLN_CHN |
| Wes Ferrell | CLE | 1.25 | 193107050_CLE_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Vic Frazier | CHA | -2.71 | 193107060_CHA_BAL |
| Dick Coffman | BAL | -2.43 | 193107060_CHA_BAL |
| Red Ruffing | NYA | -1.38 | 193107050_BOS_NYA |
| Guy Bush | CHN | -1.36 | 193107072_SLN_CHN |
| Stew Bolen | PHI | -1.3 | 193107070_LAN_PHI |
Based on accumulated WAA for this season up to 1931-07-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 7.2 | Lefty Grove | 152 | OAK |
| +010+ | 4.25 | Freddie Fitzsimmons | 127.7 | SFN |
| +013+ | 3.74 | Lloyd Brown | 142 | MIN |
| +016+ | 3.5 | Tom Zachary | 100.7 | ATL |
| +018+ | 3.38 | Ray Benge | 126.7 | PHI |
| +019+ | 3.31 | Ed Brandt | 124.7 | ATL |
| +020+ | 3.26 | Bill Hallahan | 123 | SLN |
| +021+ | 3.23 | Watty Clark | 101.7 | LAN |
| +022+ | 3.11 | Bill Walker | 98.7 | SFN |
| +024+ | 2.91 | George Earnshaw | 164 | OAK |
| +025+ | 2.78 | Charlie Root | 120.3 | CHN |
| +027+ | 2.71 | Dazzy Vance | 105 | LAN |
| +030+ | 2.57 | Heinie Meine | 130.7 | PIT |
| +032+ | 2.51 | Bob Smith | 128.3 | CHN |
| +033+ | 2.46 | Carl Hubbell | 105 | SFN |
| +035+ | 2.41 | Rube Walberg | 152.3 | OAK |
| +036+ | 2.36 | Ray Kremer | 124.3 | PIT |
| +037+ | 2.35 | Bump Hadley | 83.7 | MIN |
| +038+ | 2.26 | Si Johnson | 135 | CIN |
| +039+ | 2.21 | Frank Watt | 59 | PHI |
| +041+ | 2.13 | George Uhle | 101.3 | DET |
| +045+ | 1.8 | Jack Berly | 68 | SFN |
| +046+ | 1.79 | Socks Seibold | 109 | ATL |
| +050+ | 1.66 | Clarence Mitchell | 114 | SFN |
| +052+ | 1.65 | Jack Ogden | 39.3 | CIN |
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