| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 15.57 | 193106270_OAK_DET |
| Burleigh Grimes | SLN | 3.63 | 193106260_SLN_LAN |
| Bill Walker | SFN | 3.06 | 193106260_CIN_SFN |
| Wes Ferrell | CLE | 2.52 | 193106271_NYA_CLE |
| Watty Clark | LAN | 2.3 | 193106272_SLN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ownie Carroll | CIN | -4.77 | 193106270_CIN_SFN |
| Sam Gray | BAL | -1.19 | 193106251_OAK_BAL |
| Paul Derringer | SLN | -0.85 | 193106250_SLN_LAN |
| Guy Bush | CHN | -0.85 | 193106270_CHN_ATL |
| Spades Wood | PIT | -0.73 | 193106271_PIT_PHI |
Based on accumulated WAA for this season up to 1931-06-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.04 | Lefty Grove | 136 | OAK |
| +011+ | 3.84 | Lloyd Brown | 127.7 | MIN |
| +012+ | 3.62 | Tom Zachary | 91.7 | ATL |
| +013+ | 3.6 | Si Johnson | 121.7 | CIN |
| +014+ | 3.44 | Bill Hallahan | 105.3 | SLN |
| +016+ | 3.3 | Freddie Fitzsimmons | 111.7 | SFN |
| +017+ | 3.28 | George Uhle | 87.3 | DET |
| +020+ | 2.97 | George Earnshaw | 137.3 | OAK |
| +023+ | 2.8 | Charlie Root | 97.3 | CHN |
| +024+ | 2.79 | Ed Brandt | 106.7 | ATL |
| +026+ | 2.71 | Red Lucas | 108.7 | CIN |
| +027+ | 2.69 | Ray Benge | 108.7 | PHI |
| +028+ | 2.55 | Clarence Mitchell | 104 | SFN |
| +030+ | 2.46 | Carl Hubbell | 88 | SFN |
| +032+ | 2.37 | Bill Walker | 82.7 | SFN |
| +033+ | 2.35 | Watty Clark | 92.7 | LAN |
| +035+ | 2.32 | Rube Walberg | 130.7 | OAK |
| +036+ | 2.31 | Clise Dudley | 87.7 | PHI |
| +041+ | 1.98 | Dazzy Vance | 91 | LAN |
| +042+ | 1.97 | Frank Watt | 50 | PHI |
| +044+ | 1.8 | Heinie Meine | 121.7 | PIT |
| +045+ | 1.78 | Jack Berly | 68 | SFN |
| +048+ | 1.69 | Ray Kremer | 103.7 | PIT |
| +051+ | 1.62 | Wilcy Moore | 67.7 | BOS |
| +053+ | 1.6 | Ed Morris | 61 | BOS |
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