| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lou Fette | ATL | 9.01 | 193906240_ATL_SLN |
| Red Ruffing | NYA | 4.67 | 193906240_BAL_NYA |
| Lefty Grove | BOS | 4.1 | 193906260_BOS_MIN |
| Bob Weiland | SLN | 1.93 | 193906240_ATL_SLN |
| Tommy Bridges | DET | 1.46 | 193906260_DET_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Hugh Mulcahy | PHI | -4.37 | 193906240_PHI_CHN |
| Buck Ross | OAK | -3.02 | 193906251_CLE_OAK |
| Johnny Marcum | CHA | -2.2 | 193906240_CHA_BOS |
| Jim Bagby | BOS | -1.33 | 193906240_CHA_BOS |
| Oral Hildebrand | NYA | -0.83 | 193906252_BAL_NYA |
Based on accumulated WAA for this season up to 1939-06-26.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.4 | Tommy Bridges | 103.7 | DET |
| +002+ | 5.24 | Bucky Walters | 122.7 | CIN |
| +003+ | 4.97 | Lou Fette | 82 | ATL |
| +006+ | 4.21 | Bob Feller | 122 | CLE |
| +009+ | 3.79 | Whit Wyatt | 64.7 | LAN |
| +010+ | 3.61 | Red Ruffing | 96.3 | NYA |
| +011+ | 3.43 | Curt Davis | 114.7 | SLN |
| +017+ | 3.03 | Lefty Grove | 87 | BOS |
| +019+ | 2.97 | Dizzy Dean | 43.3 | CHN |
| +020+ | 2.78 | Atley Donald | 69.3 | NYA |
| +022+ | 2.76 | Whitey Moore | 91.3 | CIN |
| +024+ | 2.72 | Lon Warneke | 89 | SLN |
| +029+ | 2.48 | Bob Weiland | 68 | SLN |
| +031+ | 2.42 | Willis Hudlin | 95.7 | CLE |
| +033+ | 2.3 | Bump Hadley | 66.7 | NYA |
| +035+ | 2.19 | Bill Lohrman | 60.3 | SFN |
| +039+ | 2.1 | Lefty Gomez | 73 | NYA |
| +041+ | 1.98 | Hugh Casey | 56.7 | LAN |
| +043+ | 1.82 | Bob Klinger | 110 | PIT |
| +045+ | 1.66 | Claude Passeau | 104.7 | TOT |
| +048+ | 1.65 | Paul Derringer | 107.7 | CIN |
| +052+ | 1.57 | George Caster | 96 | OAK |
| +053+ | 1.55 | Syl Johnson | 37 | PHI |
| +056+ | 1.49 | Bobo Newsom | 114.3 | TOT |
| +058+ | 1.48 | Russ Bauers | 22.7 | PIT |
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