| Starter | Tm | Tier | Game |
|---|---|---|---|
| Thornton Lee | CHA | 3.42 | 193809210_NYA_CHA |
| Dutch Leonard | MIN | 1.54 | 193809200_MIN_CLE |
| Jim Turner | ATL | 1.13 | 193809210_SLN_ATL |
| Lefty Gomez | NYA | 0.74 | 193809210_NYA_CHA |
| Mel Harder | CLE | 0.42 | 193809190_OAK_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wes Ferrell | NYA | -5.93 | 193809190_NYA_BAL |
| Jim Walkup | BAL | -2.96 | 193809201_BOS_BAL |
| Buck Ross | OAK | -1.78 | 193809212_OAK_DET |
| Slick Coffman | DET | -1.4 | 193809211_OAK_DET |
| Fritz Ostermueller | BOS | -0.25 | 193809210_BOS_BAL |
Based on accumulated WAA for this season up to 1938-09-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 8.7 | Bill Lee | 263.7 | CHN |
| +007+ | 7.97 | Paul Derringer | 282 | CIN |
| +017+ | 6.38 | Lou Fette | 229 | ATL |
| +018+ | 6.31 | Freddie Fitzsimmons | 185.7 | LAN |
| +021+ | 5.89 | Red Ruffing | 235.3 | NYA |
| +023+ | 5.81 | Thornton Lee | 227.3 | CHA |
| +025+ | 5.54 | Johnny Vander Meer | 195.3 | CIN |
| +026+ | 5.52 | Russ Bauers | 224 | PIT |
| +027+ | 5.44 | Clay Bryant | 243.3 | CHN |
| +029+ | 5.27 | Danny MacFayden | 196.3 | ATL |
| +030+ | 5.18 | Bill McGee | 203.7 | SLN |
| +032+ | 4.95 | Carl Hubbell | 179 | SFN |
| +036+ | 4.66 | Bob Klinger | 145.7 | PIT |
| +040+ | 4.4 | Dutch Leonard | 218.3 | MIN |
| +044+ | 4.22 | Lefty Gomez | 227 | NYA |
| +045+ | 4.17 | Charlie Root | 145 | CHN |
| +046+ | 4.04 | Ira Hutchinson | 132.7 | ATL |
| +050+ | 3.55 | Jim Tobin | 212.3 | PIT |
| +053+ | 3.36 | Jim Turner | 247.3 | ATL |
| +054+ | 3.19 | Al Benton | 85 | DET |
| +056+ | 3.02 | Johnny Rigney | 143 | CHA |
| +057+ | 2.99 | Lon Warneke | 187.7 | SLN |
| +058+ | 2.98 | Dick Errickson | 111.3 | ATL |
| +060+ | 2.93 | Ted Lyons | 177.7 | CHA |
| +061+ | 2.78 | Luke Hamlin | 217.7 | LAN |
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