| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | BOS | 6.85 | 193806180_BOS_CHA |
| Carl Hubbell | SFN | 6.24 | 193806160_PIT_SFN |
| Bill Lee | CHN | 5.69 | 193806171_CHN_ATL |
| Johnny Allen | CLE | 3.93 | 193806170_OAK_CLE |
| Paul Derringer | CIN | 3.73 | 193806180_CIN_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wes Ferrell | MIN | -2.55 | 193806171_MIN_DET |
| Jack Knott | CHA | -1.23 | 193806170_BOS_CHA |
| Bud Thomas | OAK | -1.1 | 193806160_OAK_DET |
| Roxie Lawson | DET | -0.85 | 193806172_MIN_DET |
| Hugh Mulcahy | PHI | -0.71 | 193806180_PIT_PHI |
Based on accumulated WAA for this season up to 1938-06-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.03 | Bill Lee | 106.3 | CHN |
| +005+ | 4.7 | Lefty Grove | 117.7 | BOS |
| +006+ | 4.2 | Johnny Vander Meer | 92.7 | CIN |
| +007+ | 3.84 | Paul Derringer | 117 | CIN |
| +010+ | 3.67 | Bob Feller | 92 | CLE |
| +012+ | 3.42 | Carl Hubbell | 88 | SFN |
| +015+ | 3.1 | Red Ruffing | 84 | NYA |
| +016+ | 3.1 | Cliff Melton | 106 | SFN |
| +018+ | 2.98 | Danny MacFayden | 87.3 | ATL |
| +019+ | 2.75 | Johnny Allen | 99.7 | CLE |
| +020+ | 2.72 | Jack Wilson | 81.3 | BOS |
| +021+ | 2.69 | Bill McGee | 82 | SLN |
| +023+ | 2.55 | Lynn Nelson | 90 | OAK |
| +024+ | 2.52 | Hal Schumacher | 87.3 | SFN |
| +025+ | 2.51 | Bob Klinger | 63.7 | PIT |
| +028+ | 2.45 | Freddie Fitzsimmons | 81.7 | LAN |
| +027+ | 2.45 | Tot Pressnell | 81.7 | LAN |
| +029+ | 2.38 | Bill Swift | 62.3 | PIT |
| +035+ | 2 | Monty Stratton | 47.3 | CHA |
| +036+ | 1.9 | Dizzy Dean | 25.7 | CHN |
| +038+ | 1.83 | Ted Lyons | 66.7 | CHA |
| +041+ | 1.74 | Jim Weaver | 62.7 | TOT |
| +040+ | 1.74 | Buck Ross | 50.7 | OAK |
| +042+ | 1.72 | Larry French | 98.3 | CHN |
| +046+ | 1.61 | George Caster | 95.3 | OAK |
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