| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 5.64 | 193107112_SFN_PHI |
| Dazzy Vance | LAN | 3.25 | 193107100_LAN_ATL |
| Charlie Root | CHN | 2.93 | 193107121_CHN_SLN |
| Rube Walberg | OAK | 2 | 193107100_OAK_NYA |
| George Uhle | DET | 1.94 | 193107111_BAL_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Les Sweetland | CHN | -2.61 | 193107111_CHN_PIT |
| Waite Hoyt | OAK | -1.7 | 193107121_OAK_BOS |
| Stew Bolen | PHI | -1.45 | 193107121_PHI_SFN |
| Red Ruffing | NYA | -1.22 | 193107110_OAK_NYA |
| Ray Kolp | CIN | -0.83 | 193107110_CIN_SLN |
Based on accumulated WAA for this season up to 1931-07-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 7.89 | Lefty Grove | 161 | OAK |
| +009+ | 5.1 | Freddie Fitzsimmons | 144.7 | SFN |
| +014+ | 3.83 | Watty Clark | 110.7 | LAN |
| +015+ | 3.76 | Lloyd Brown | 153 | MIN |
| +017+ | 3.71 | Ed Brandt | 133.7 | ATL |
| +019+ | 3.51 | George Earnshaw | 172 | OAK |
| +020+ | 3.46 | Tom Zachary | 107.7 | ATL |
| +021+ | 3.44 | Ray Benge | 135.7 | PHI |
| +026+ | 3.04 | Heinie Meine | 140 | PIT |
| +027+ | 2.9 | Carl Hubbell | 114 | SFN |
| +028+ | 2.84 | Bill Walker | 107 | SFN |
| +029+ | 2.8 | Ray Kremer | 133.3 | PIT |
| +030+ | 2.76 | Dazzy Vance | 112.7 | LAN |
| +033+ | 2.62 | Bill Hallahan | 129.7 | SLN |
| +035+ | 2.56 | Bob Smith | 128.3 | CHN |
| +036+ | 2.48 | Charlie Root | 125.3 | CHN |
| +037+ | 2.44 | Si Johnson | 143 | CIN |
| +038+ | 2.38 | Rube Walberg | 158.3 | OAK |
| +039+ | 2.24 | Socks Seibold | 123 | ATL |
| +040+ | 2.2 | Bump Hadley | 91.7 | MIN |
| +049+ | 1.92 | Fred Frankhouse | 70.7 | ATL |
| +051+ | 1.91 | George Uhle | 110.3 | DET |
| +052+ | 1.91 | Jack Ogden | 45.3 | CIN |
| +055+ | 1.8 | Clarence Mitchell | 122 | SFN |
| +056+ | 1.73 | Firpo Marberry | 84.7 | MIN |
_