| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 15.72 | 193108150_OAK_CLE |
| Bill Walker | SFN | 5.85 | 193108161_SLN_SFN |
| Ed Brandt | ATL | 3.08 | 193108141_CIN_ATL |
| Lloyd Brown | MIN | 2.46 | 193108162_MIN_BAL |
| Charlie Root | CHN | 1.28 | 193108161_CHN_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Stew Bolen | PHI | -3.27 | 193108152_PIT_PHI |
| Guy Bush | CHN | -1.93 | 193108162_CHN_ATL |
| Ed Durham | BOS | -1.88 | 193108162_BOS_CHA |
| Chief Hogsett | DET | -1.8 | 193108150_NYA_DET |
| Ray Kolp | CIN | -1.25 | 193108142_CIN_ATL |
Based on accumulated WAA for this season up to 1931-08-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 10.69 | Lefty Grove | 218.3 | OAK |
| +009+ | 6.89 | Bill Walker | 180 | SFN |
| +010+ | 6.57 | Ed Brandt | 186.7 | ATL |
| +011+ | 6.16 | Freddie Fitzsimmons | 198.3 | SFN |
| +012+ | 5.89 | Carl Hubbell | 182.7 | SFN |
| +016+ | 5.07 | Ray Kremer | 194.3 | PIT |
| +018+ | 4.74 | Lefty Gomez | 164 | NYA |
| +019+ | 4.51 | Ray Benge | 192.7 | PHI |
| +024+ | 4.35 | Tom Zachary | 157.3 | ATL |
| +025+ | 4.13 | Firpo Marberry | 156.7 | MIN |
| +026+ | 3.81 | Dazzy Vance | 168 | LAN |
| +027+ | 3.79 | Bill Hallahan | 172.7 | SLN |
| +029+ | 3.74 | Lloyd Brown | 185.3 | MIN |
| +031+ | 3.58 | Charlie Root | 188.7 | CHN |
| +032+ | 3.53 | Si Johnson | 202.7 | CIN |
| +034+ | 3.41 | George Earnshaw | 236.3 | OAK |
| +035+ | 3.25 | Rube Walberg | 221.7 | OAK |
| +036+ | 3.18 | Larry French | 214 | PIT |
| +038+ | 3 | Heinie Meine | 199 | PIT |
| +039+ | 2.97 | Larry Benton | 144.7 | CIN |
| +040+ | 2.93 | Jesse Haines | 101.3 | SLN |
| +041+ | 2.89 | Flint Rhem | 161.3 | SLN |
| +042+ | 2.82 | Watty Clark | 160 | LAN |
| +049+ | 2.57 | Bill Sherdel | 104.3 | ATL |
| +050+ | 2.5 | Glenn Spencer | 119.7 | PIT |
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