| Starter | Tm | Tier | Game |
|---|---|---|---|
| Paul Derringer | CIN | 4.07 | 193909100_CIN_CHN |
| Hugh Casey | LAN | 2.56 | 193909090_SFN_LAN |
| Mace Brown | PIT | 1.5 | 193909090_SLN_PIT |
| Bill Lohrman | SFN | 1.01 | 193909090_SFN_LAN |
| Marius Russo | NYA | 1.01 | 193909101_MIN_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Nels Potter | OAK | -7.53 | 193909110_BOS_OAK |
| George Gill | BAL | -3.59 | 193909090_CLE_BAL |
| Joe Haynes | MIN | -2.17 | 193909090_MIN_NYA |
| Elden Auker | BOS | -1.2 | 193909090_BOS_OAK |
| Bill Dietrich | CHA | -0.52 | 193909102_CHA_DET |
Based on accumulated WAA for this season up to 1939-09-11.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.95 | Bucky Walters | 269 | CIN |
| +005+ | 8.68 | Bob Feller | 253 | CLE |
| +006+ | 8.24 | Red Ruffing | 219 | NYA |
| +010+ | 7.11 | Paul Derringer | 256 | CIN |
| +013+ | 6.33 | Lefty Grove | 166 | BOS |
| +014+ | 6.02 | Hugh Casey | 186 | LAN |
| +022+ | 5.12 | Ted Lyons | 147.7 | CHA |
| +023+ | 5.04 | Carl Hubbell | 125 | SFN |
| +027+ | 4.58 | Bob Bowman | 142 | SLN |
| +028+ | 4.54 | Marius Russo | 98 | NYA |
| +030+ | 4.37 | Claude Passeau | 226.3 | TOT |
| +031+ | 4.35 | Bump Hadley | 136 | NYA |
| +034+ | 4.26 | Lou Fette | 146 | ATL |
| +035+ | 3.89 | Steve Sundra | 95.7 | NYA |
| +038+ | 3.62 | Milt Shoffner | 154.7 | TOT |
| +040+ | 3.57 | Dutch Leonard | 234.3 | MIN |
| +041+ | 3.56 | Mace Brown | 176 | PIT |
| +043+ | 3.49 | Curt Davis | 220.3 | SLN |
| +045+ | 3.47 | Bobo Newsom | 256.3 | TOT |
| +046+ | 3.35 | Johnny Rigney | 195 | CHA |
| +047+ | 3.33 | Bill Lee | 240.3 | CHN |
| +050+ | 3.25 | Bill Lohrman | 167.7 | SFN |
| +051+ | 3.22 | Lefty Gomez | 173 | NYA |
| +052+ | 3.19 | Bill Posedel | 199.3 | ATL |
| +053+ | 3.15 | Mort Cooper | 174.3 | SLN |
_