| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Lee | CHN | 4.43 | 193809110_CIN_CHN |
| Danny MacFayden | ATL | 4.11 | 193809111_ATL_PHI |
| Paul Derringer | CIN | 3.81 | 193809110_CIN_CHN |
| Thornton Lee | CHA | 3.07 | 193809132_MIN_CHA |
| Red Ruffing | NYA | 2.19 | 193809130_NYA_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ken Chase | MIN | -2.3 | 193809131_MIN_CHA |
| Russ Van Atta | BAL | -1.97 | 193809112_BAL_CLE |
| Vern Kennedy | DET | -1.01 | 193809130_BOS_DET |
| Hugh Mulcahy | PHI | -0.92 | 193809111_ATL_PHI |
| George Caster | OAK | -0.35 | 193809110_OAK_BOS |
Based on accumulated WAA for this season up to 1938-09-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 8 | Bill Lee | 254.7 | CHN |
| +008+ | 7.19 | Paul Derringer | 273 | CIN |
| +009+ | 7.1 | Lou Fette | 226 | ATL |
| +020+ | 6.02 | Freddie Fitzsimmons | 176.7 | LAN |
| +022+ | 5.73 | Red Ruffing | 227.3 | NYA |
| +023+ | 5.66 | Johnny Vander Meer | 189.3 | CIN |
| +025+ | 5.58 | Danny MacFayden | 185.3 | ATL |
| +026+ | 5.48 | Thornton Lee | 218.3 | CHA |
| +027+ | 5.35 | Clay Bryant | 236.3 | CHN |
| +030+ | 5.03 | Carl Hubbell | 179 | SFN |
| +031+ | 4.85 | Bill McGee | 197 | SLN |
| +032+ | 4.84 | Russ Bauers | 208.7 | PIT |
| +033+ | 4.73 | Dutch Leonard | 204.3 | MIN |
| +036+ | 4.6 | Charlie Root | 133.3 | CHN |
| +043+ | 4.11 | Bob Klinger | 136.7 | PIT |
| +045+ | 3.74 | Ira Hutchinson | 128.7 | ATL |
| +047+ | 3.59 | Jim Turner | 239.3 | ATL |
| +049+ | 3.39 | Lefty Gomez | 210 | NYA |
| +050+ | 3.27 | Jim Tobin | 203.3 | PIT |
| +054+ | 3.09 | Lon Warneke | 187.7 | SLN |
| +055+ | 3.08 | Bob Weiland | 215.3 | SLN |
| +058+ | 2.94 | Al Benton | 76 | DET |
| +059+ | 2.9 | Bill Swift | 128.7 | PIT |
| +060+ | 2.89 | Bump Hadley | 139.3 | NYA |
| +061+ | 2.77 | Ted Lyons | 168.7 | CHA |
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