| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lou Fette | ATL | 5.97 | 193907272_ATL_CIN |
| Bucky Walters | CIN | 5.74 | 193907250_ATL_CIN |
| Red Ruffing | NYA | 5.11 | 193907260_BAL_NYA |
| Lefty Grove | BOS | 3.92 | 193907251_CHA_BOS |
| Bob Klinger | PIT | 1.5 | 193907270_PHI_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Johnny Marcum | CHA | -3.39 | 193907252_CHA_BOS |
| Nels Potter | OAK | -2.78 | 193907260_CLE_OAK |
| George Gill | BAL | -2.06 | 193907260_BAL_NYA |
| Max Butcher | PHI | -1.04 | 193907270_PHI_PIT |
| Jack Wilson | BOS | -0.62 | 193907261_CHA_BOS |
Based on accumulated WAA for this season up to 1939-07-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.36 | Bucky Walters | 187.3 | CIN |
| +003+ | 6.33 | Red Ruffing | 144 | NYA |
| +004+ | 6.02 | Bob Feller | 169.3 | CLE |
| +007+ | 5.51 | Atley Donald | 113.3 | NYA |
| +009+ | 5.25 | Lou Fette | 112.3 | ATL |
| +014+ | 4.86 | Paul Derringer | 167.7 | CIN |
| +015+ | 4.82 | Mace Brown | 106 | PIT |
| +016+ | 4.57 | Lefty Grove | 120 | BOS |
| +018+ | 4.43 | Whit Wyatt | 109 | LAN |
| +019+ | 4.42 | Tommy Bridges | 131.7 | DET |
| +020+ | 4.39 | Bump Hadley | 98.3 | NYA |
| +023+ | 3.85 | Hugh Casey | 107.3 | LAN |
| +025+ | 3.59 | Bill Posedel | 133.7 | ATL |
| +027+ | 3.55 | Milt Shoffner | 116.3 | ATL |
| +029+ | 3.33 | Whitey Moore | 121 | CIN |
| +030+ | 3.28 | Mort Cooper | 106 | SLN |
| +031+ | 3.23 | Bobo Newsom | 178 | TOT |
| +034+ | 3.04 | Curt Davis | 155 | SLN |
| +037+ | 2.98 | Bill Swift | 80 | PIT |
| +038+ | 2.92 | Ted Lyons | 109 | CHA |
| +041+ | 2.75 | Bill Lohrman | 102.3 | SFN |
| +043+ | 2.68 | Danny MacFayden | 133 | ATL |
| +046+ | 2.52 | Claude Passeau | 151 | TOT |
| +045+ | 2.52 | Bob Klinger | 151 | PIT |
| +048+ | 2.41 | Carl Hubbell | 64.3 | SFN |
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