| 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 |
| Ray Kremer | PIT | 2.16 | 193107270_SFN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Guy Bush | CHN | -2.47 | 193107270_PHI_CHN |
| Jack Russell | BOS | -2.21 | 193107291_DET_BOS |
| Tommy Bridges | DET | -1.9 | 193107270_DET_BOS |
| Hal McKain | CHA | -1.79 | 193107272_CHA_NYA |
| Phil Collins | PHI | -0.76 | 193107280_PHI_CHN |
Based on accumulated WAA for this season up to 1931-07-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 9.23 | Lefty Grove | 189 | OAK |
| +010+ | 5.44 | Ed Brandt | 160.7 | ATL |
| +011+ | 4.92 | Ray Benge | 167.7 | PHI |
| +013+ | 4.82 | Carl Hubbell | 150.7 | SFN |
| +015+ | 4.65 | Tom Zachary | 133.3 | ATL |
| +016+ | 4.55 | Charlie Root | 161.3 | CHN |
| +017+ | 4.5 | Freddie Fitzsimmons | 162.3 | SFN |
| +018+ | 4.47 | Lloyd Brown | 172.3 | MIN |
| +020+ | 4.16 | Bill Hallahan | 149.3 | SLN |
| +021+ | 4.13 | Si Johnson | 179 | CIN |
| +025+ | 3.91 | Bill Walker | 139.3 | SFN |
| +026+ | 3.77 | Ray Kremer | 167.3 | PIT |
| +029+ | 3.36 | Dazzy Vance | 141 | LAN |
| +030+ | 3.33 | Watty Clark | 140.7 | LAN |
| +031+ | 3.21 | Heinie Meine | 168 | PIT |
| +033+ | 2.89 | George Earnshaw | 208 | OAK |
| +034+ | 2.77 | Rube Walberg | 196 | OAK |
| +035+ | 2.74 | Larry French | 178.3 | PIT |
| +038+ | 2.52 | Bump Hadley | 108.7 | MIN |
| +039+ | 2.5 | Bob Smith | 151 | CHN |
| +048+ | 2.25 | Jack Ogden | 68.3 | CIN |
| +049+ | 2.17 | George Uhle | 137 | DET |
| +052+ | 2.07 | Sam Jones | 112.7 | MIN |
| +055+ | 1.99 | Syl Johnson | 118.7 | SLN |
| +057+ | 1.89 | Red Lucas | 148.3 | CIN |
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