| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ownie Carroll | CIN | -3.19 | 193106242_CIN_ATL |
| Garland Braxton | CHA | -2.89 | 193106240_NYA_CHA |
| Guy Bush | CHN | -1.11 | 193106220_CHN_SFN |
| Spades Wood | PIT | -1.08 | 193106220_PIT_LAN |
| Ray Moss | ATL | -0.89 | 193106232_CIN_ATL |
Based on accumulated WAA for this season up to 1931-06-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.1 | Lefty Grove | 127 | OAK |
| +008+ | 3.74 | Lloyd Brown | 127.7 | MIN |
| +009+ | 3.57 | Tom Zachary | 91.7 | ATL |
| +012+ | 3.53 | Si Johnson | 121.7 | CIN |
| +015+ | 3.37 | Bill Hallahan | 97 | SLN |
| +017+ | 3.34 | George Earnshaw | 129.3 | OAK |
| +018+ | 3.24 | George Uhle | 87.3 | DET |
| +019+ | 3.24 | Freddie Fitzsimmons | 111.7 | SFN |
| +021+ | 2.97 | Clarence Mitchell | 98 | SFN |
| +023+ | 2.74 | Ed Brandt | 106.7 | ATL |
| +024+ | 2.73 | Charlie Root | 97.3 | CHN |
| +025+ | 2.71 | Heinie Meine | 115 | PIT |
| +027+ | 2.65 | Red Lucas | 108.7 | CIN |
| +032+ | 2.48 | Burleigh Grimes | 98.7 | SLN |
| +033+ | 2.42 | Carl Hubbell | 88 | SFN |
| +035+ | 2.28 | Watty Clark | 86 | LAN |
| +036+ | 2.21 | Ray Benge | 100 | PHI |
| +040+ | 2.01 | Rube Walberg | 128.7 | OAK |
| +041+ | 1.81 | Jim Lindsey | 33.7 | SLN |
| +044+ | 1.7 | Jack Berly | 61 | SFN |
| +045+ | 1.69 | Socks Seibold | 96 | ATL |
| +048+ | 1.61 | Larry French | 127.3 | PIT |
| +050+ | 1.6 | Clise Dudley | 78.7 | PHI |
| +049+ | 1.6 | Ed Morris | 61 | BOS |
| +051+ | 1.59 | Ray Kremer | 103.7 | PIT |
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