| Starter | Tm | Tier | Game |
|---|---|---|---|
| Milt Shoffner | CLE | -1.57 | 193106201_MIN_CLE |
| Phil Collins | PHI | -1.02 | 193106190_CIN_PHI |
| Fred Frankhouse | ATL | -0.68 | 193106211_SLN_ATL |
| Ray Kolp | CIN | -0.66 | 193106190_CIN_PHI |
| Hank Johnson | NYA | -0.45 | 193106190_NYA_BAL |
Based on accumulated WAA for this season up to 1931-06-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.14 | Lefty Grove | 118 | OAK |
| +007+ | 4.25 | Freddie Fitzsimmons | 110 | SFN |
| +009+ | 3.84 | Tom Zachary | 82.7 | ATL |
| +011+ | 3.78 | Lloyd Brown | 120.3 | MIN |
| +014+ | 3.32 | Si Johnson | 112.7 | CIN |
| +015+ | 3.25 | George Earnshaw | 129.3 | OAK |
| +017+ | 3.02 | Bill Hallahan | 90 | SLN |
| +020+ | 2.89 | Clarence Mitchell | 98 | SFN |
| +021+ | 2.88 | Charlie Root | 93.3 | CHN |
| +023+ | 2.84 | George Uhle | 77.3 | DET |
| +025+ | 2.7 | Rube Walberg | 123.7 | OAK |
| +027+ | 2.59 | Heinie Meine | 115 | PIT |
| +028+ | 2.58 | Ed Brandt | 102 | ATL |
| +030+ | 2.39 | Burleigh Grimes | 98.7 | SLN |
| +031+ | 2.34 | Ed Morris | 56.3 | BOS |
| +036+ | 2.01 | Jack Berly | 56 | SFN |
| +037+ | 1.99 | Ray Benge | 92 | PHI |
| +039+ | 1.85 | Ray Kremer | 96.7 | PIT |
| +042+ | 1.72 | Bill Walker | 72.7 | SFN |
| +043+ | 1.69 | Watty Clark | 76 | LAN |
| +044+ | 1.62 | Red Lucas | 99.7 | CIN |
| +045+ | 1.59 | Jim Lindsey | 31.7 | SLN |
| +047+ | 1.57 | Socks Seibold | 96 | ATL |
| +048+ | 1.54 | Larry French | 119.3 | PIT |
| +049+ | 1.54 | Clise Dudley | 78.7 | PHI |
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