| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | BOS | 7.05 | 193806220_BOS_DET |
| Carl Hubbell | SFN | 4.92 | 193806210_CIN_SFN |
| Johnny Allen | CLE | 4.64 | 193806222_NYA_CLE |
| Red Ruffing | NYA | 3.9 | 193806210_NYA_CLE |
| Paul Derringer | CIN | 2.81 | 193806220_CIN_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Walkup | BAL | -2.92 | 193806230_OAK_BAL |
| Wes Ferrell | MIN | -2.64 | 193806220_MIN_CHA |
| Mel Harder | CLE | -1.06 | 193806221_NYA_CLE |
| Vern Kennedy | DET | -0.77 | 193806220_BOS_DET |
| Charlie Wagner | BOS | -0.71 | 193806212_BOS_DET |
Based on accumulated WAA for this season up to 1938-06-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.81 | Bill Lee | 115.3 | CHN |
| +007+ | 4.59 | Johnny Vander Meer | 109.3 | CIN |
| +008+ | 4.32 | Lefty Grove | 120.7 | BOS |
| +009+ | 3.89 | Paul Derringer | 123.7 | CIN |
| +010+ | 3.68 | Tot Pressnell | 99.7 | LAN |
| +011+ | 3.58 | Bob Feller | 101 | CLE |
| +012+ | 3.5 | Johnny Allen | 108.7 | CLE |
| +015+ | 3.34 | Lynn Nelson | 99 | OAK |
| +016+ | 3.32 | Bill McGee | 88 | SLN |
| +019+ | 2.99 | Danny MacFayden | 87.3 | ATL |
| +020+ | 2.97 | Cliff Melton | 113 | SFN |
| +021+ | 2.93 | Jack Wilson | 82.3 | BOS |
| +022+ | 2.87 | Carl Hubbell | 95 | SFN |
| +025+ | 2.57 | Bob Klinger | 65.7 | PIT |
| +026+ | 2.51 | Freddie Fitzsimmons | 81.7 | LAN |
| +027+ | 2.44 | Monty Stratton | 57.7 | CHA |
| +029+ | 2.34 | Dutch Leonard | 100.3 | MIN |
| +035+ | 2.14 | Lou Fette | 91.7 | ATL |
| +041+ | 1.94 | Jim Weaver | 69 | TOT |
| +042+ | 1.93 | Dizzy Dean | 25.7 | CHN |
| +045+ | 1.88 | George Caster | 107.3 | OAK |
| +046+ | 1.87 | Ted Lyons | 66.7 | CHA |
| +047+ | 1.85 | Bill Swift | 67 | PIT |
| +049+ | 1.83 | Red Ruffing | 90.3 | NYA |
| +050+ | 1.72 | Peaches Davis | 67 | CIN |
_