| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bucky Walters | CIN | 7.38 | 193908040_LAN_CIN |
| Red Ruffing | NYA | 5.41 | 193908050_CLE_NYA |
| Lou Fette | ATL | 4.86 | 193908040_ATL_CHN |
| Carl Hubbell | SFN | 2.28 | 193908050_SFN_PIT |
| Hugh Casey | LAN | 1.45 | 193908040_LAN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Mills | BAL | -4.51 | 193908030_BAL_MIN |
| Nels Potter | OAK | -3.04 | 193908050_BAL_OAK |
| Hugh Mulcahy | PHI | -1.56 | 193908030_PHI_CHN |
| Max Butcher | PIT | -1.29 | 193908030_LAN_PIT |
| Elden Auker | BOS | -1.28 | 193908050_DET_BOS |
Based on accumulated WAA for this season up to 1939-08-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.95 | Bucky Walters | 205.3 | CIN |
| +003+ | 6.99 | Red Ruffing | 162 | NYA |
| +008+ | 5.85 | Lou Fette | 120.3 | ATL |
| +009+ | 5.76 | Bob Feller | 183.3 | CLE |
| +014+ | 4.67 | Paul Derringer | 177.7 | CIN |
| +015+ | 4.66 | Atley Donald | 118.3 | NYA |
| +018+ | 4.33 | Lefty Grove | 129 | BOS |
| +019+ | 4.27 | Bump Hadley | 100 | NYA |
| +020+ | 4.23 | Hugh Casey | 122 | LAN |
| +022+ | 3.96 | Tommy Bridges | 148.7 | DET |
| +025+ | 3.71 | Curt Davis | 172 | SLN |
| +026+ | 3.7 | Mort Cooper | 122 | SLN |
| +028+ | 3.55 | Mace Brown | 123.7 | PIT |
| +029+ | 3.52 | Bill Posedel | 147.7 | ATL |
| +030+ | 3.49 | Claude Passeau | 168 | TOT |
| +031+ | 3.33 | Carl Hubbell | 82.3 | SFN |
| +033+ | 3.14 | Bill Lohrman | 119.7 | SFN |
| +034+ | 3.11 | Whitey Moore | 130.3 | CIN |
| +036+ | 3.06 | Ted Lyons | 117 | CHA |
| +039+ | 2.98 | Dutch Leonard | 163.3 | MIN |
| +040+ | 2.97 | Danny MacFayden | 140 | ATL |
| +042+ | 2.84 | Milt Shoffner | 119.7 | ATL |
| +044+ | 2.81 | Bobo Newsom | 191.3 | TOT |
| +047+ | 2.69 | Lon Warneke | 130.7 | SLN |
| +048+ | 2.66 | Bob Bowman | 103.3 | SLN |
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