| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 5.38 | 193107050_SFN_LAN |
| Lloyd Brown | MIN | 2.8 | 193107041_MIN_NYA |
| George Earnshaw | OAK | 2.58 | 193107050_OAK_MIN |
| Watty Clark | LAN | 2.36 | 193107042_SFN_LAN |
| Charlie Root | CHN | 1.77 | 193107041_CIN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Waite Hoyt | OAK | -2.39 | 193107042_BOS_OAK |
| Sam Gray | BAL | -1.56 | 193107051_CHA_BAL |
| Red Ruffing | NYA | -1.38 | 193107050_BOS_NYA |
| Vic Frazier | CHA | -1.36 | 193107042_CHA_BAL |
| Stew Bolen | PHI | -1.27 | 193107031_SLN_PHI |
Based on accumulated WAA for this season up to 1931-07-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 7.35 | Lefty Grove | 152 | OAK |
| +010+ | 4.23 | Freddie Fitzsimmons | 127.7 | SFN |
| +013+ | 3.91 | Bill Hallahan | 117.3 | SLN |
| +014+ | 3.87 | Lloyd Brown | 142 | MIN |
| +017+ | 3.48 | Tom Zachary | 100.7 | ATL |
| +019+ | 3.36 | Ray Benge | 126.7 | PHI |
| +020+ | 3.29 | Ed Brandt | 124.7 | ATL |
| +021+ | 3.19 | Watty Clark | 101.7 | LAN |
| +022+ | 3.09 | Bill Walker | 98.7 | SFN |
| +024+ | 2.87 | Bob Smith | 119.3 | CHN |
| +025+ | 2.81 | George Earnshaw | 155 | OAK |
| +027+ | 2.68 | Dazzy Vance | 105 | LAN |
| +028+ | 2.55 | Heinie Meine | 130.7 | PIT |
| +033+ | 2.45 | Carl Hubbell | 105 | SFN |
| +034+ | 2.34 | Ray Kremer | 124.3 | PIT |
| +035+ | 2.3 | Charlie Root | 111.3 | CHN |
| +036+ | 2.24 | Si Johnson | 135 | CIN |
| +037+ | 2.2 | Frank Watt | 59 | PHI |
| +041+ | 2.1 | George Uhle | 101.3 | DET |
| +042+ | 1.83 | Rube Walberg | 145 | OAK |
| +044+ | 1.79 | Jack Berly | 68 | SFN |
| +046+ | 1.77 | Socks Seibold | 109 | ATL |
| +053+ | 1.65 | Jack Ogden | 39.3 | CIN |
| +052+ | 1.65 | Bump Hadley | 75.7 | MIN |
| +054+ | 1.64 | Clarence Mitchell | 114 | SFN |
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