| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bucky Walters | CIN | 11.79 | 193909120_LAN_CIN |
| Bob Feller | CLE | 5.12 | 193909130_CLE_NYA |
| Red Ruffing | NYA | 4.66 | 193909130_CLE_NYA |
| Hugh Casey | LAN | 2.78 | 193909130_LAN_CIN |
| Lefty Grove | BOS | 2.74 | 193909130_DET_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Nels Potter | OAK | -7.53 | 193909110_BOS_OAK |
| Jack Kramer | BAL | -4.49 | 193909130_BAL_OAK |
| Alex Carrasquel | MIN | -0.66 | 193909120_CHA_MIN |
| Fred Hutchinson | DET | -0.57 | 193909130_DET_BOS |
| Denny Galehouse | BOS | -0.45 | 193909120_DET_BOS |
Based on accumulated WAA for this season up to 1939-09-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 12.62 | Bucky Walters | 279 | CIN |
| +005+ | 8.63 | Bob Feller | 262 | CLE |
| +007+ | 7.91 | Red Ruffing | 225 | NYA |
| +010+ | 7.18 | Lefty Grove | 175 | BOS |
| +011+ | 7.02 | Paul Derringer | 256 | CIN |
| +014+ | 6.03 | Hugh Casey | 193 | LAN |
| +016+ | 5.95 | Ted Lyons | 158.7 | CHA |
| +023+ | 5.01 | Carl Hubbell | 125 | SFN |
| +026+ | 4.83 | Bob Bowman | 145 | SLN |
| +027+ | 4.78 | Claude Passeau | 235.3 | TOT |
| +029+ | 4.51 | Marius Russo | 98 | NYA |
| +032+ | 4.3 | Bump Hadley | 136 | NYA |
| +034+ | 4.24 | Lou Fette | 146 | ATL |
| +035+ | 3.85 | Steve Sundra | 95.7 | NYA |
| +036+ | 3.73 | Bill Lee | 249.3 | CHN |
| +039+ | 3.6 | Milt Shoffner | 154.7 | TOT |
| +040+ | 3.5 | Mace Brown | 176 | PIT |
| +042+ | 3.47 | Dutch Leonard | 234.3 | MIN |
| +045+ | 3.43 | Curt Davis | 220.3 | SLN |
| +044+ | 3.43 | Bobo Newsom | 256.3 | TOT |
| +048+ | 3.31 | Lefty Gomez | 183 | NYA |
| +049+ | 3.27 | Johnny Rigney | 195 | CHA |
| +050+ | 3.21 | Bill Lohrman | 167.7 | SFN |
| +052+ | 3.13 | Junior Thompson | 118.7 | CIN |
| +058+ | 2.99 | Mort Cooper | 175.3 | SLN |
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