| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Hubbell | SFN | 5.78 | 193107280_SFN_PIT |
| Charlie Root | CHN | 4.05 | 193107280_PHI_CHN |
| Tom Zachary | ATL | 3.21 | 193107280_ATL_SLN |
| Watty Clark | LAN | 2.35 | 193107280_LAN_CIN |
| Firpo Marberry | MIN | 1.7 | 193107290_CLE_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Waite Hoyt | OAK | -2.46 | 193107300_BAL_OAK |
| Jack Russell | BOS | -2.21 | 193107291_DET_BOS |
| Chief Hogsett | DET | -1.28 | 193107292_DET_BOS |
| Phil Collins | PHI | -0.76 | 193107280_PHI_CHN |
| Carl Fischer | MIN | -0.56 | 193107300_CLE_MIN |
Based on accumulated WAA for this season up to 1931-07-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 9.25 | Lefty Grove | 189 | OAK |
| +008+ | 5.46 | Ed Brandt | 160.7 | ATL |
| +011+ | 4.94 | Ray Benge | 167.7 | PHI |
| +013+ | 4.85 | Carl Hubbell | 150.7 | SFN |
| +015+ | 4.67 | Tom Zachary | 133.3 | ATL |
| +016+ | 4.59 | Charlie Root | 161.3 | CHN |
| +017+ | 4.54 | Freddie Fitzsimmons | 162.3 | SFN |
| +018+ | 4.5 | Lloyd Brown | 172.3 | MIN |
| +022+ | 4.18 | Bill Hallahan | 149.3 | SLN |
| +023+ | 4.15 | Si Johnson | 179 | CIN |
| +026+ | 3.94 | Bill Walker | 139.3 | SFN |
| +027+ | 3.8 | Ray Kremer | 167.3 | PIT |
| +028+ | 3.63 | Larry French | 187.3 | PIT |
| +030+ | 3.38 | Dazzy Vance | 141 | LAN |
| +031+ | 3.35 | Watty Clark | 140.7 | LAN |
| +032+ | 3.23 | Heinie Meine | 168 | PIT |
| +034+ | 2.92 | George Earnshaw | 208 | OAK |
| +036+ | 2.8 | Rube Walberg | 196 | OAK |
| +038+ | 2.54 | Bump Hadley | 108.7 | MIN |
| +047+ | 2.26 | Jack Ogden | 68.3 | CIN |
| +048+ | 2.19 | George Uhle | 137 | DET |
| +049+ | 2.08 | Sam Jones | 112.7 | MIN |
| +053+ | 2.01 | Syl Johnson | 118.7 | SLN |
| +058+ | 1.91 | Red Lucas | 148.3 | CIN |
| +059+ | 1.83 | Fred Frankhouse | 83 | ATL |
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