| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 5.85 | 193108161_SLN_SFN |
| Tom Zachary | ATL | 2.57 | 193108172_CHN_ATL |
| Lloyd Brown | MIN | 2.46 | 193108162_MIN_BAL |
| Charlie Root | CHN | 1.28 | 193108161_CHN_ATL |
| Larry French | PIT | 1.06 | 193108171_PIT_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pat Caraway | CHA | -4.78 | 193108170_BOS_CHA |
| Jack Russell | BOS | -3.63 | 193108170_BOS_CHA |
| Stew Bolen | PHI | -2.76 | 193108180_PIT_PHI |
| Guy Bush | CHN | -1.93 | 193108162_CHN_ATL |
| Red Ruffing | NYA | -1.89 | 193108180_NYA_DET |
Based on accumulated WAA for this season up to 1931-08-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 10.62 | Lefty Grove | 218.3 | OAK |
| +008+ | 6.93 | Bill Walker | 181 | SFN |
| +010+ | 6.69 | Ed Brandt | 188.7 | ATL |
| +012+ | 5.83 | Carl Hubbell | 182.7 | SFN |
| +013+ | 5.62 | Freddie Fitzsimmons | 206.3 | SFN |
| +016+ | 5.03 | Ray Kremer | 194.3 | PIT |
| +019+ | 4.7 | Lefty Gomez | 166.3 | NYA |
| +020+ | 4.58 | Tom Zachary | 164.7 | ATL |
| +023+ | 4.44 | Ray Benge | 192.7 | PHI |
| +025+ | 4.15 | Si Johnson | 211.7 | CIN |
| +026+ | 4.1 | Firpo Marberry | 156.7 | MIN |
| +027+ | 4.02 | Lloyd Brown | 188.7 | MIN |
| +028+ | 4 | Larry French | 223 | PIT |
| +030+ | 3.76 | Dazzy Vance | 168 | LAN |
| +031+ | 3.75 | Bill Hallahan | 172.7 | SLN |
| +034+ | 3.52 | Charlie Root | 188.7 | CHN |
| +035+ | 3.33 | George Earnshaw | 236.3 | OAK |
| +036+ | 3.21 | Bob Smith | 187.7 | CHN |
| +037+ | 3.18 | Rube Walberg | 221.7 | OAK |
| +039+ | 3.03 | Watty Clark | 167 | LAN |
| +041+ | 2.95 | Heinie Meine | 199 | PIT |
| +042+ | 2.93 | Fred Frankhouse | 97.7 | ATL |
| +043+ | 2.91 | Jesse Haines | 101.3 | SLN |
| +044+ | 2.91 | Larry Benton | 144.7 | CIN |
| +045+ | 2.85 | Flint Rhem | 161.3 | SLN |
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