| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 15.57 | 193106270_OAK_DET |
| Burleigh Grimes | SLN | 3.63 | 193106260_SLN_LAN |
| George Uhle | DET | 3.41 | 193106282_OAK_DET |
| Charlie Root | CHN | 3.22 | 193106281_CHN_ATL |
| Bill Walker | SFN | 3.06 | 193106260_CIN_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ownie Carroll | CIN | -4.77 | 193106270_CIN_SFN |
| Sam Gray | BAL | -1.87 | 193106281_BOS_BAL |
| Ed Durham | BOS | -1.12 | 193106282_BOS_BAL |
| Guy Bush | CHN | -0.85 | 193106270_CHN_ATL |
| Spades Wood | PIT | -0.73 | 193106271_PIT_PHI |
Based on accumulated WAA for this season up to 1931-06-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.04 | Lefty Grove | 136 | OAK |
| +008+ | 4.26 | Lloyd Brown | 134 | MIN |
| +011+ | 3.77 | Freddie Fitzsimmons | 118.7 | SFN |
| +014+ | 3.48 | Tom Zachary | 91.7 | ATL |
| +015+ | 3.46 | Bill Hallahan | 105.3 | SLN |
| +017+ | 3.29 | Ed Brandt | 115.7 | ATL |
| +018+ | 3.18 | Si Johnson | 127.7 | CIN |
| +021+ | 3.12 | George Uhle | 96.3 | DET |
| +022+ | 2.99 | Rube Walberg | 139.7 | OAK |
| +023+ | 2.97 | George Earnshaw | 137.3 | OAK |
| +026+ | 2.69 | Ray Benge | 108.7 | PHI |
| +027+ | 2.66 | Bill Walker | 85.7 | SFN |
| +029+ | 2.55 | Clarence Mitchell | 104 | SFN |
| +032+ | 2.47 | Carl Hubbell | 88 | SFN |
| +033+ | 2.35 | Watty Clark | 92.7 | LAN |
| +035+ | 2.31 | Clise Dudley | 87.7 | PHI |
| +036+ | 2.07 | Bob Smith | 108.3 | CHN |
| +038+ | 1.98 | Dazzy Vance | 91 | LAN |
| +039+ | 1.97 | Frank Watt | 50 | PHI |
| +044+ | 1.8 | Heinie Meine | 121.7 | PIT |
| +045+ | 1.8 | Charlie Root | 101.3 | CHN |
| +046+ | 1.78 | Jack Berly | 68 | SFN |
| +047+ | 1.69 | Ray Kremer | 103.7 | PIT |
| +053+ | 1.57 | Ed Morris | 69 | BOS |
| +055+ | 1.45 | Socks Seibold | 101 | ATL |
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