| 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 | -8.93 | 193909140_CHA_OAK |
| Jack Kramer | BAL | -4.49 | 193909130_BAL_OAK |
| Elden Auker | BOS | -0.97 | 193909140_CLE_BOS |
| Alex Carrasquel | MIN | -0.66 | 193909120_CHA_MIN |
| Fred Hutchinson | DET | -0.57 | 193909130_DET_BOS |
Based on accumulated WAA for this season up to 1939-09-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 12.63 | Bucky Walters | 279 | CIN |
| +005+ | 8.64 | Bob Feller | 262 | CLE |
| +006+ | 7.92 | Red Ruffing | 225 | NYA |
| +010+ | 7.18 | Lefty Grove | 175 | BOS |
| +011+ | 6.86 | Paul Derringer | 265 | CIN |
| +014+ | 6.06 | Hugh Casey | 193 | LAN |
| +015+ | 5.95 | Ted Lyons | 158.7 | CHA |
| +025+ | 4.84 | Bob Bowman | 145 | SLN |
| +026+ | 4.79 | Claude Passeau | 235.3 | TOT |
| +029+ | 4.51 | Marius Russo | 98 | NYA |
| +031+ | 4.3 | Bump Hadley | 136 | NYA |
| +032+ | 4.3 | Milt Shoffner | 161.7 | TOT |
| +034+ | 4.26 | Lou Fette | 146 | ATL |
| +035+ | 4.19 | Carl Hubbell | 127 | SFN |
| +036+ | 4.17 | Dutch Leonard | 243.3 | MIN |
| +037+ | 4.13 | Bobo Newsom | 265.3 | TOT |
| +038+ | 3.86 | Steve Sundra | 95.7 | NYA |
| +040+ | 3.78 | Mace Brown | 185 | PIT |
| +042+ | 3.74 | Bill Lee | 249.3 | CHN |
| +046+ | 3.53 | Curt Davis | 227.7 | SLN |
| +050+ | 3.31 | Lefty Gomez | 183 | NYA |
| +051+ | 3.3 | Larry French | 172.3 | CHN |
| +052+ | 3.27 | Johnny Rigney | 195 | CHA |
| +053+ | 3.24 | Bill Lohrman | 167.7 | SFN |
| +054+ | 3.14 | Junior Thompson | 118.7 | CIN |
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