| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bucky Walters | CIN | 10.49 | 193909050_CIN_SLN |
| Lefty Grove | BOS | 2.9 | 193909060_BOS_NYA |
| Carl Hubbell | SFN | 2.41 | 193909070_SFN_ATL |
| Hugh Casey | LAN | 2.36 | 193909050_ATL_LAN |
| Lou Fette | ATL | 2.14 | 193909050_ATL_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Nels Potter | OAK | -6.24 | 193909070_MIN_OAK |
| George Gill | BAL | -3.9 | 193909050_BAL_DET |
| Ray Harrell | PHI | -0.86 | 193909050_PHI_SFN |
| Al Benton | DET | -0.65 | 193909050_BAL_DET |
| Monte Pearson | NYA | -0.32 | 193909070_BOS_NYA |
Based on accumulated WAA for this season up to 1939-09-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 11.42 | Bucky Walters | 260 | CIN |
| +005+ | 7.83 | Bob Feller | 243 | CLE |
| +006+ | 7.68 | Red Ruffing | 212 | NYA |
| +010+ | 6.58 | Paul Derringer | 247 | CIN |
| +013+ | 6.26 | Lefty Grove | 166 | BOS |
| +016+ | 5.69 | Hugh Casey | 177 | LAN |
| +021+ | 5.1 | Claude Passeau | 221.7 | TOT |
| +022+ | 5.08 | Ted Lyons | 147.7 | CHA |
| +023+ | 5 | Carl Hubbell | 125 | SFN |
| +029+ | 4.31 | Mace Brown | 167 | PIT |
| +030+ | 4.23 | Lou Fette | 146 | ATL |
| +033+ | 4.05 | Bob Bowman | 137 | SLN |
| +034+ | 4.04 | Marius Russo | 89 | NYA |
| +035+ | 3.92 | Dutch Leonard | 226.3 | MIN |
| +037+ | 3.82 | Bump Hadley | 129 | NYA |
| +038+ | 3.8 | Cliff Melton | 173.7 | SFN |
| +040+ | 3.59 | Milt Shoffner | 154.7 | TOT |
| +042+ | 3.54 | Johnny Rigney | 189 | CHA |
| +044+ | 3.45 | Mort Cooper | 169.3 | SLN |
| +045+ | 3.38 | Steve Sundra | 86.7 | NYA |
| +047+ | 3.29 | Bill Lee | 240.3 | CHN |
| +049+ | 3.21 | Larry French | 156.3 | CHN |
| +050+ | 3.18 | Curt Davis | 211.3 | SLN |
| +052+ | 3.16 | Bill Posedel | 199.3 | ATL |
| +051+ | 3.16 | Lefty Gomez | 173 | NYA |
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