| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bucky Walters | CIN | 6.9 | 193908160_CHN_CIN |
| Red Ruffing | NYA | 6.3 | 193908180_OAK_NYA |
| Bob Feller | CLE | 3.77 | 193908180_CLE_CHA |
| Lefty Grove | BOS | 3.37 | 193908170_BOS_OAK |
| Bob Klinger | PIT | 1.71 | 193908161_SLN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Mills | BAL | -4.73 | 193908170_CLE_BAL |
| Hugh Mulcahy | PHI | -1.21 | 193908162_PHI_ATL |
| Alex Carrasquel | MIN | -1.05 | 193908180_BOS_MIN |
| Max Butcher | PIT | -1.04 | 193908162_SLN_PIT |
| Cotton Pippen | OAK | -0.97 | 193908180_OAK_NYA |
Based on accumulated WAA for this season up to 1939-08-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.33 | Bucky Walters | 227.3 | CIN |
| +003+ | 8.59 | Red Ruffing | 186 | NYA |
| +005+ | 7.52 | Bob Feller | 211.3 | CLE |
| +011+ | 5.54 | Lefty Grove | 147 | BOS |
| +013+ | 5.41 | Lou Fette | 135.7 | ATL |
| +016+ | 4.66 | Curt Davis | 190 | SLN |
| +017+ | 4.63 | Mort Cooper | 139.7 | SLN |
| +019+ | 4.34 | Paul Derringer | 201 | CIN |
| +021+ | 4.21 | Carl Hubbell | 95 | SFN |
| +023+ | 4.06 | Hugh Casey | 141.7 | LAN |
| +028+ | 3.92 | Ted Lyons | 129.7 | CHA |
| +029+ | 3.79 | Bob Bowman | 114.7 | SLN |
| +030+ | 3.76 | Mace Brown | 139.3 | PIT |
| +031+ | 3.7 | Bump Hadley | 113 | NYA |
| +032+ | 3.62 | Bob Klinger | 179 | PIT |
| +033+ | 3.6 | Claude Passeau | 186 | TOT |
| +034+ | 3.6 | Tommy Bridges | 164 | DET |
| +038+ | 3.41 | Bill Lohrman | 138.7 | SFN |
| +039+ | 3.4 | Milt Shoffner | 132.3 | ATL |
| +040+ | 3.38 | Whitey Moore | 147.3 | CIN |
| +045+ | 3.08 | Atley Donald | 129.7 | NYA |
| +048+ | 2.94 | Dutch Leonard | 185.3 | MIN |
| +049+ | 2.82 | Bobo Newsom | 212.3 | TOT |
| +056+ | 2.62 | Lefty Gomez | 141.7 | NYA |
| +059+ | 2.47 | Bob Weiland | 103.7 | SLN |
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