| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Hubbell | SFN | 6.62 | 193108121_PIT_SFN |
| Ed Brandt | ATL | 3.08 | 193108141_CIN_ATL |
| Ray Kremer | PIT | 2.67 | 193108121_PIT_SFN |
| Dazzy Vance | LAN | 2.1 | 193108130_SLN_LAN |
| George Earnshaw | OAK | 1.8 | 193108120_OAK_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Hank Johnson | NYA | -1.27 | 193108122_NYA_CLE |
| Ray Kolp | CIN | -1.25 | 193108142_CIN_ATL |
| Phil Collins | PHI | -1.19 | 193108130_CHN_PHI |
| Guy Bush | CHN | -1.14 | 193108140_CHN_PHI |
| Sam Gray | BAL | -0.84 | 193108120_BOS_BAL |
Based on accumulated WAA for this season up to 1931-08-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 10.52 | Lefty Grove | 209.3 | OAK |
| +008+ | 6.63 | Ed Brandt | 186.7 | ATL |
| +010+ | 6.13 | Freddie Fitzsimmons | 197.3 | SFN |
| +011+ | 6.07 | Bill Walker | 171 | SFN |
| +013+ | 5.48 | Carl Hubbell | 175.7 | SFN |
| +015+ | 5.09 | Ray Kremer | 194.3 | PIT |
| +018+ | 4.58 | Ray Benge | 192.7 | PHI |
| +019+ | 4.57 | Lloyd Brown | 182 | MIN |
| +022+ | 4.4 | Tom Zachary | 157.3 | ATL |
| +024+ | 4.37 | Lefty Gomez | 156.3 | NYA |
| +026+ | 3.98 | Firpo Marberry | 147.7 | MIN |
| +027+ | 3.95 | Bill Hallahan | 169.7 | SLN |
| +028+ | 3.87 | Dazzy Vance | 168 | LAN |
| +032+ | 3.57 | Si Johnson | 202.7 | CIN |
| +033+ | 3.49 | George Earnshaw | 236.3 | OAK |
| +034+ | 3.22 | Rube Walberg | 220.7 | OAK |
| +035+ | 3.2 | Larry French | 214 | PIT |
| +036+ | 2.99 | Larry Benton | 144.7 | CIN |
| +037+ | 2.98 | Charlie Root | 179.7 | CHN |
| +038+ | 2.95 | Jesse Haines | 101.3 | SLN |
| +042+ | 2.87 | Watty Clark | 160 | LAN |
| +041+ | 2.87 | Heinie Meine | 191 | PIT |
| +046+ | 2.6 | Bill Sherdel | 104.3 | ATL |
| +047+ | 2.58 | Burleigh Grimes | 166.3 | SLN |
| +050+ | 2.51 | Glenn Spencer | 119.7 | PIT |
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