| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Hubbell | SFN | 4.23 | 193107041_SFN_LAN |
| George Uhle | DET | 3.09 | 193107020_NYA_DET |
| Lloyd Brown | MIN | 2.8 | 193107041_MIN_NYA |
| Rube Walberg | OAK | 2.68 | 193107020_OAK_CLE |
| Watty Clark | LAN | 2.36 | 193107042_SFN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Waite Hoyt | OAK | -2.39 | 193107042_BOS_OAK |
| Vic Frazier | CHA | -1.36 | 193107042_CHA_BAL |
| Stew Bolen | PHI | -1.27 | 193107031_SLN_PHI |
| Guy Bush | CHN | -1.03 | 193107042_CIN_CHN |
| Hank Johnson | NYA | -0.71 | 193107042_MIN_NYA |
Based on accumulated WAA for this season up to 1931-07-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 7.39 | Lefty Grove | 152 | OAK |
| +010+ | 4.28 | Freddie Fitzsimmons | 127.7 | SFN |
| +013+ | 3.97 | Bill Hallahan | 117.3 | SLN |
| +014+ | 3.93 | Lloyd Brown | 142 | MIN |
| +016+ | 3.55 | Ray Benge | 119.7 | PHI |
| +017+ | 3.52 | Tom Zachary | 100.7 | ATL |
| +019+ | 3.34 | Ed Brandt | 124.7 | ATL |
| +021+ | 3.24 | Watty Clark | 101.7 | LAN |
| +023+ | 3.15 | Bill Walker | 94.7 | SFN |
| +024+ | 3.01 | Si Johnson | 133.7 | CIN |
| +025+ | 2.94 | Bob Smith | 119.3 | CHN |
| +027+ | 2.72 | Dazzy Vance | 105 | LAN |
| +028+ | 2.6 | Heinie Meine | 130.7 | PIT |
| +030+ | 2.48 | Carl Hubbell | 105 | SFN |
| +031+ | 2.4 | Ray Kremer | 124.3 | PIT |
| +032+ | 2.36 | Charlie Root | 111.3 | CHN |
| +035+ | 2.27 | George Earnshaw | 147 | OAK |
| +037+ | 2.22 | Frank Watt | 59 | PHI |
| +039+ | 2.12 | George Uhle | 101.3 | DET |
| +043+ | 1.87 | Rube Walberg | 145 | OAK |
| +045+ | 1.82 | Socks Seibold | 109 | ATL |
| +046+ | 1.81 | Jack Berly | 68 | SFN |
| +052+ | 1.68 | Bump Hadley | 75.7 | MIN |
| +050+ | 1.68 | Clarence Mitchell | 114 | SFN |
| +053+ | 1.66 | Jack Ogden | 39.3 | CIN |
_