| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Hubbell | SFN | 5.11 | 193107230_SFN_CIN |
| Tom Zachary | ATL | 3.68 | 193107220_ATL_CHN |
| Dazzy Vance | LAN | 3.22 | 193107230_LAN_PIT |
| Ray Kremer | PIT | 1.78 | 193107222_LAN_PIT |
| George Earnshaw | OAK | 1.53 | 193107230_CLE_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Vic Frazier | CHA | -1.87 | 193107210_CHA_OAK |
| Jack Russell | BOS | -1.71 | 193107230_CHA_BOS |
| Red Ruffing | NYA | -1.13 | 193107222_DET_NYA |
| Waite Hoyt | OAK | -0.89 | 193107210_CHA_OAK |
| Tommy Bridges | DET | -0.72 | 193107222_DET_NYA |
Based on accumulated WAA for this season up to 1931-07-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 8.81 | Lefty Grove | 178 | OAK |
| +011+ | 4.64 | Watty Clark | 127.7 | LAN |
| +013+ | 4.5 | Ed Brandt | 150.7 | ATL |
| +014+ | 4.21 | Lloyd Brown | 166.7 | MIN |
| +016+ | 4.13 | Carl Hubbell | 139 | SFN |
| +017+ | 4.1 | Ray Kremer | 160.3 | PIT |
| +019+ | 3.9 | Tom Zachary | 125.3 | ATL |
| +020+ | 3.86 | Ray Benge | 150.7 | PHI |
| +022+ | 3.71 | Charlie Root | 143.3 | CHN |
| +024+ | 3.66 | Freddie Fitzsimmons | 153.3 | SFN |
| +025+ | 3.6 | Bill Hallahan | 140.3 | SLN |
| +027+ | 3.52 | Bill Walker | 122.3 | SFN |
| +028+ | 3.46 | Si Johnson | 169 | CIN |
| +029+ | 3.45 | Heinie Meine | 158 | PIT |
| +032+ | 2.87 | George Earnshaw | 201 | OAK |
| +033+ | 2.55 | Dazzy Vance | 132 | LAN |
| +035+ | 2.5 | Rube Walberg | 184.3 | OAK |
| +036+ | 2.33 | Jack Ogden | 60.3 | CIN |
| +050+ | 1.93 | Lefty Gomez | 119.7 | NYA |
| +051+ | 1.92 | Jack Berly | 85 | SFN |
| +052+ | 1.92 | George Uhle | 127.3 | DET |
| +053+ | 1.91 | Red Lucas | 141.3 | CIN |
| +055+ | 1.9 | Bob Smith | 142 | CHN |
| +056+ | 1.86 | Bump Hadley | 101.3 | MIN |
| +058+ | 1.84 | Firpo Marberry | 107.7 | MIN |
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