| 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 |
| Paul Derringer | SLN | -0.85 | 193106250_SLN_LAN |
| Phil Collins | PHI | -0.68 | 193106242_SLN_PHI |
Based on accumulated WAA for this season up to 1931-06-26.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.16 | Lefty Grove | 127 | OAK |
| +008+ | 3.79 | Lloyd Brown | 127.7 | MIN |
| +011+ | 3.58 | Tom Zachary | 91.7 | ATL |
| +012+ | 3.56 | Si Johnson | 121.7 | CIN |
| +015+ | 3.4 | Bill Hallahan | 97 | SLN |
| +016+ | 3.25 | Freddie Fitzsimmons | 111.7 | SFN |
| +018+ | 3.25 | George Uhle | 87.3 | DET |
| +020+ | 2.92 | George Earnshaw | 137.3 | OAK |
| +024+ | 2.77 | Charlie Root | 97.3 | CHN |
| +025+ | 2.75 | Ed Brandt | 106.7 | ATL |
| +026+ | 2.68 | Red Lucas | 108.7 | CIN |
| +028+ | 2.51 | Clarence Mitchell | 104 | SFN |
| +029+ | 2.43 | Carl Hubbell | 88 | SFN |
| +031+ | 2.34 | Bill Walker | 82.7 | SFN |
| +033+ | 2.3 | Watty Clark | 86 | LAN |
| +034+ | 2.28 | Clise Dudley | 87.7 | PHI |
| +035+ | 2.27 | Rube Walberg | 130.7 | OAK |
| +036+ | 2.23 | Ray Benge | 100 | PHI |
| +040+ | 1.95 | Frank Watt | 50 | PHI |
| +042+ | 1.94 | Dazzy Vance | 91 | LAN |
| +045+ | 1.74 | Heinie Meine | 121.7 | PIT |
| +047+ | 1.71 | Jack Berly | 61 | SFN |
| +050+ | 1.67 | Larry French | 127.3 | PIT |
| +051+ | 1.65 | Wilcy Moore | 67.7 | BOS |
| +052+ | 1.64 | Ray Kremer | 103.7 | PIT |
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