| Starter | Tm | Tier | Game |
|---|---|---|---|
| Paul Derringer | CIN | 4 | 193909280_SLN_CIN |
| Lefty Grove | BOS | 3.4 | 193909281_BOS_MIN |
| Hugh Casey | LAN | 1.81 | 193909292_LAN_ATL |
| Mort Cooper | SLN | 1.48 | 193909301_SLN_CHN |
| Bump Hadley | NYA | 1.42 | 193909282_OAK_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Bagby | BOS | -2.4 | 193909301_BOS_NYA |
| Roxie Lawson | BAL | -1.92 | 193909301_CHA_BAL |
| Joe Haynes | MIN | -1.75 | 193909300_MIN_OAK |
| Ike Pearson | PHI | -1.66 | 193909281_SFN_PHI |
| Hal Schumacher | SFN | -0.4 | 193909282_SFN_PHI |
Based on accumulated WAA for this season up to 1939-09-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 13.78 | Bucky Walters | 315 | CIN |
| +005+ | 9.13 | Bob Feller | 287.7 | CLE |
| +007+ | 8.64 | Paul Derringer | 301 | CIN |
| +011+ | 7.57 | Lefty Grove | 191 | BOS |
| +013+ | 7.18 | Red Ruffing | 233.3 | NYA |
| +017+ | 6.29 | Bob Bowman | 169.3 | SLN |
| +018+ | 6.09 | Ted Lyons | 172.7 | CHA |
| +021+ | 5.83 | Hugh Casey | 220.3 | LAN |
| +024+ | 5.72 | Carl Hubbell | 154 | SFN |
| +026+ | 5.45 | Claude Passeau | 266.3 | TOT |
| +029+ | 5.21 | Junior Thompson | 146.7 | CIN |
| +031+ | 4.99 | Marius Russo | 116 | NYA |
| +032+ | 4.99 | Bill Lee | 282.3 | CHN |
| +034+ | 4.68 | Dutch Leonard | 269.3 | MIN |
| +035+ | 4.67 | Mort Cooper | 210.7 | SLN |
| +037+ | 4.56 | Bump Hadley | 154 | NYA |
| +040+ | 4.19 | Steve Sundra | 120.7 | NYA |
| +042+ | 4.16 | Bobo Newsom | 286.7 | TOT |
| +043+ | 4.13 | Larry French | 194.3 | CHN |
| +044+ | 4.09 | Milt Shoffner | 170 | TOT |
| +045+ | 3.88 | Lefty Gomez | 198 | NYA |
| +047+ | 3.79 | Mace Brown | 196.7 | PIT |
| +048+ | 3.77 | Cliff Melton | 207.3 | SFN |
| +049+ | 3.71 | Mel Harder | 208 | CLE |
| +051+ | 3.53 | Oral Hildebrand | 126.7 | NYA |
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