| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Feller | CLE | 5.12 | 193909130_CLE_NYA |
| Red Ruffing | NYA | 4.66 | 193909130_CLE_NYA |
| Paul Derringer | CIN | 4.43 | 193909141_SFN_CIN |
| Hugh Casey | LAN | 2.78 | 193909130_LAN_CIN |
| Lefty Grove | BOS | 2.74 | 193909130_DET_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Nels Potter | OAK | -8.93 | 193909140_CHA_OAK |
| Vern Kennedy | BAL | -4.69 | 193909150_BAL_MIN |
| Elden Auker | BOS | -0.97 | 193909140_CLE_BOS |
| Bill Dietrich | CHA | -0.78 | 193909150_CHA_OAK |
| Al Hollingsworth | LAN | -0.68 | 193909150_LAN_PIT |
Based on accumulated WAA for this season up to 1939-09-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 12.68 | Bucky Walters | 279 | CIN |
| +005+ | 8.63 | Bob Feller | 262 | CLE |
| +007+ | 7.91 | Red Ruffing | 225 | NYA |
| +010+ | 7.17 | Lefty Grove | 175 | BOS |
| +012+ | 6.9 | Paul Derringer | 265 | CIN |
| +014+ | 6.04 | Hugh Casey | 193 | LAN |
| +016+ | 5.95 | Ted Lyons | 158.7 | CHA |
| +019+ | 5.85 | Bob Bowman | 156 | SLN |
| +020+ | 5.48 | Claude Passeau | 242.3 | TOT |
| +029+ | 4.51 | Marius Russo | 98 | NYA |
| +030+ | 4.3 | Bump Hadley | 136 | NYA |
| +032+ | 4.25 | Milt Shoffner | 161.7 | TOT |
| +034+ | 4.21 | Carl Hubbell | 127 | SFN |
| +035+ | 4.2 | Lou Fette | 146 | ATL |
| +036+ | 4.16 | Dutch Leonard | 243.3 | MIN |
| +037+ | 4.14 | Bobo Newsom | 265.3 | TOT |
| +038+ | 4.12 | Steve Sundra | 104.7 | NYA |
| +041+ | 3.75 | Mace Brown | 185 | PIT |
| +042+ | 3.73 | Bill Lee | 249.3 | CHN |
| +046+ | 3.54 | Junior Thompson | 122.7 | CIN |
| +047+ | 3.43 | Curt Davis | 227.7 | SLN |
| +048+ | 3.31 | Lefty Gomez | 183 | NYA |
| +050+ | 3.3 | Larry French | 172.3 | CHN |
| +052+ | 3.28 | Johnny Rigney | 195 | CHA |
| +058+ | 2.92 | Mort Cooper | 175.3 | SLN |
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