| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 13.37 | 193106231_OAK_BAL |
| Freddie Fitzsimmons | SFN | 4.25 | 193106242_CHN_SFN |
| Tom Zachary | ATL | 3.29 | 193106242_CIN_ATL |
| George Uhle | DET | 2.87 | 193106232_MIN_DET |
| Lefty Stewart | BAL | 2.12 | 193106252_OAK_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ownie Carroll | CIN | -3.19 | 193106242_CIN_ATL |
| Garland Braxton | CHA | -2.89 | 193106240_NYA_CHA |
| Sam Gray | BAL | -1.19 | 193106251_OAK_BAL |
| Ray Moss | ATL | -0.89 | 193106232_CIN_ATL |
| Paul Derringer | SLN | -0.85 | 193106250_SLN_LAN |
Based on accumulated WAA for this season up to 1931-06-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.14 | Lefty Grove | 127 | OAK |
| +008+ | 3.73 | Lloyd Brown | 127.7 | MIN |
| +011+ | 3.56 | Tom Zachary | 91.7 | ATL |
| +012+ | 3.52 | Si Johnson | 121.7 | CIN |
| +015+ | 3.36 | Bill Hallahan | 97 | SLN |
| +017+ | 3.23 | Freddie Fitzsimmons | 111.7 | SFN |
| +018+ | 3.23 | George Uhle | 87.3 | DET |
| +022+ | 2.89 | George Earnshaw | 137.3 | OAK |
| +024+ | 2.74 | Charlie Root | 97.3 | CHN |
| +025+ | 2.73 | Ed Brandt | 106.7 | ATL |
| +026+ | 2.72 | Heinie Meine | 115 | PIT |
| +027+ | 2.64 | Red Lucas | 108.7 | CIN |
| +029+ | 2.49 | Clarence Mitchell | 104 | SFN |
| +030+ | 2.47 | Burleigh Grimes | 98.7 | SLN |
| +032+ | 2.41 | Carl Hubbell | 88 | SFN |
| +035+ | 2.28 | Watty Clark | 86 | LAN |
| +036+ | 2.26 | Clise Dudley | 87.7 | PHI |
| +037+ | 2.24 | Rube Walberg | 130.7 | OAK |
| +038+ | 2.2 | Ray Benge | 100 | PHI |
| +042+ | 1.92 | Dazzy Vance | 91 | LAN |
| +043+ | 1.81 | Jim Lindsey | 33.7 | SLN |
| +046+ | 1.69 | Jack Berly | 61 | SFN |
| +047+ | 1.68 | Socks Seibold | 96 | ATL |
| +050+ | 1.62 | Larry French | 127.3 | PIT |
| +051+ | 1.6 | Ray Kremer | 103.7 | PIT |
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