| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 6.74 | 193108302_PHI_SFN |
| Ed Brandt | ATL | 6.05 | 193108301_ATL_LAN |
| Lloyd Brown | MIN | 2.4 | 193108310_MIN_NYA |
| Ray Kremer | PIT | 2.18 | 193108301_PIT_SLN |
| Ray Benge | PHI | 1.85 | 193108301_PHI_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pat Caraway | CHA | -6.76 | 193108310_CLE_CHA |
| Rollie Stiles | BAL | -3.31 | 193108310_DET_BAL |
| Waite Hoyt | OAK | -1.88 | 193108310_BOS_OAK |
| Hank Johnson | NYA | -1.88 | 193108300_NYA_BOS |
| General Crowder | MIN | -0.57 | 193108300_OAK_MIN |
Based on accumulated WAA for this season up to 1931-09-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 11.49 | Lefty Grove | 240.7 | OAK |
| +007+ | 8.65 | Bill Walker | 207 | SFN |
| +008+ | 8.57 | Ed Brandt | 218.7 | ATL |
| +012+ | 7.01 | Carl Hubbell | 209.7 | SFN |
| +013+ | 6.65 | Freddie Fitzsimmons | 227.7 | SFN |
| +017+ | 5.19 | Larry French | 239.3 | PIT |
| +019+ | 5.1 | Bill Hallahan | 198.7 | SLN |
| +020+ | 5.08 | Ray Kremer | 216.3 | PIT |
| +023+ | 4.84 | Tom Zachary | 186.3 | ATL |
| +024+ | 4.8 | Ray Benge | 210.3 | PHI |
| +025+ | 4.57 | Lloyd Brown | 213.7 | MIN |
| +026+ | 4.49 | Lefty Gomez | 195.3 | NYA |
| +027+ | 4.38 | Dazzy Vance | 192.7 | LAN |
| +031+ | 4.05 | Charlie Root | 211.7 | CHN |
| +032+ | 3.91 | Heinie Meine | 226 | PIT |
| +034+ | 3.84 | Bob Smith | 203 | CHN |
| +035+ | 3.83 | Watty Clark | 182.7 | LAN |
| +037+ | 3.74 | Si Johnson | 228.7 | CIN |
| +039+ | 3.66 | George Earnshaw | 240 | OAK |
| +042+ | 3.52 | Firpo Marberry | 178.7 | MIN |
| +043+ | 3.46 | Jesse Haines | 116.3 | SLN |
| +046+ | 3.26 | Glenn Spencer | 151.7 | PIT |
| +052+ | 2.8 | Jim Mooney | 37.7 | SFN |
| +051+ | 2.8 | Fred Heimach | 111.3 | LAN |
| +054+ | 2.63 | Syl Johnson | 155.7 | SLN |
_