| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Feller | CLE | 5.03 | 193909171_CLE_OAK |
| Red Ruffing | NYA | 4.07 | 193909171_BAL_NYA |
| Paul Derringer | CIN | 3.77 | 193909171_ATL_CIN |
| Hugh Casey | LAN | 2.68 | 193909171_LAN_CHN |
| Claude Passeau | CHN | 1.69 | 193909172_LAN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Nels Potter | OAK | -7.53 | 193909190_DET_OAK |
| Lefty Mills | BAL | -5.83 | 193909172_BAL_NYA |
| Jack Wilson | BOS | -0.61 | 193909190_BAL_BOS |
| Kirby Higbe | PHI | -0.5 | 193909190_PHI_CIN |
| Harry Gumbert | SFN | -0.18 | 193909190_SFN_CHN |
Based on accumulated WAA for this season up to 1939-09-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 13.27 | Bucky Walters | 288 | CIN |
| +005+ | 8.73 | Bob Feller | 270 | CLE |
| +009+ | 7.29 | Paul Derringer | 274 | CIN |
| +010+ | 7.19 | Red Ruffing | 233.3 | NYA |
| +011+ | 7.11 | Lefty Grove | 175 | BOS |
| +015+ | 6.03 | Hugh Casey | 202 | LAN |
| +017+ | 5.9 | Ted Lyons | 158.7 | CHA |
| +020+ | 5.84 | Bob Bowman | 156.3 | SLN |
| +021+ | 5.78 | Claude Passeau | 250.3 | TOT |
| +027+ | 4.9 | Carl Hubbell | 136 | SFN |
| +029+ | 4.73 | Bump Hadley | 145 | NYA |
| +030+ | 4.53 | Marius Russo | 107 | NYA |
| +032+ | 4.51 | Dutch Leonard | 252.3 | MIN |
| +033+ | 4.33 | Bill Lee | 258.3 | CHN |
| +036+ | 4.21 | Lou Fette | 146 | ATL |
| +037+ | 4.17 | Mace Brown | 194 | PIT |
| +038+ | 4.08 | Steve Sundra | 104.7 | NYA |
| +042+ | 3.85 | Bobo Newsom | 271.7 | TOT |
| +044+ | 3.72 | Lefty Gomez | 192 | NYA |
| +043+ | 3.72 | Milt Shoffner | 162.7 | TOT |
| +046+ | 3.68 | Junior Thompson | 128.7 | CIN |
| +047+ | 3.61 | Mort Cooper | 185 | SLN |
| +049+ | 3.59 | Cliff Melton | 191.7 | SFN |
| +050+ | 3.55 | Larry French | 179.7 | CHN |
| +051+ | 3.48 | Oral Hildebrand | 117.7 | NYA |
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