| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | BOS | 4.99 | 193907161_BOS_DET |
| Bucky Walters | CIN | 4.11 | 193907170_CIN_ATL |
| Bob Feller | CLE | 3.52 | 193907170_NYA_CLE |
| Danny MacFayden | ATL | 3.08 | 193907170_CIN_ATL |
| Lefty Gomez | NYA | 2.53 | 193907161_NYA_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Hugh Mulcahy | PHI | -3.89 | 193907161_PIT_PHI |
| Vern Kennedy | BAL | -2.33 | 193907170_OAK_BAL |
| Nels Potter | OAK | -2.09 | 193907150_OAK_CHA |
| Johnny Rigney | CHA | -0.57 | 193907150_OAK_CHA |
| Ken Chase | MIN | -0.54 | 193907150_MIN_BAL |
Based on accumulated WAA for this season up to 1939-07-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.08 | Bucky Walters | 169.3 | CIN |
| +003+ | 5.55 | Bob Feller | 160.3 | CLE |
| +007+ | 5.09 | Lou Fette | 100.3 | ATL |
| +008+ | 4.96 | Tommy Bridges | 120.3 | DET |
| +010+ | 4.91 | Red Ruffing | 126 | NYA |
| +013+ | 4.41 | Bump Hadley | 90.3 | NYA |
| +014+ | 4.33 | Whit Wyatt | 100 | LAN |
| +017+ | 3.87 | Lefty Grove | 111 | BOS |
| +016+ | 3.87 | Atley Donald | 95.3 | NYA |
| +018+ | 3.86 | Mace Brown | 90.3 | PIT |
| +025+ | 3.18 | Lefty Gomez | 105 | NYA |
| +027+ | 3.15 | Bill Lohrman | 93.3 | SFN |
| +028+ | 3.13 | Danny MacFayden | 118.7 | ATL |
| +030+ | 3.08 | Paul Derringer | 140.7 | CIN |
| +033+ | 2.83 | Curt Davis | 137.7 | SLN |
| +034+ | 2.8 | Whitey Moore | 106.7 | CIN |
| +037+ | 2.56 | Hugh Casey | 83.3 | LAN |
| +036+ | 2.56 | Bob Klinger | 132.7 | PIT |
| +039+ | 2.53 | Bobo Newsom | 158.7 | TOT |
| +040+ | 2.51 | Bill Posedel | 116.7 | ATL |
| +041+ | 2.49 | Claude Passeau | 134 | TOT |
| +043+ | 2.45 | Bill Swift | 60.3 | PIT |
| +044+ | 2.44 | Ted Lyons | 100 | CHA |
| +045+ | 2.43 | Mort Cooper | 91 | SLN |
| +047+ | 2.36 | Lon Warneke | 110.7 | SLN |
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