| Starter | Tm | Tier | Game |
|---|---|---|---|
| Red Ruffing | NYA | 2.87 | 193809181_NYA_BAL |
| Russ Bauers | PIT | 2.09 | 193809181_PIT_PHI |
| Charlie Root | CHN | 1.95 | 193809181_CHN_LAN |
| Dutch Leonard | MIN | 1.54 | 193809200_MIN_CLE |
| Mel Harder | CLE | 0.42 | 193809190_OAK_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wes Ferrell | NYA | -5.93 | 193809190_NYA_BAL |
| Lynn Nelson | OAK | -3.78 | 193809181_OAK_CLE |
| Jim Walkup | BAL | -2.96 | 193809201_BOS_BAL |
| Ken Chase | MIN | -2.05 | 193809180_MIN_DET |
| Vern Kennedy | DET | -0.94 | 193809190_MIN_DET |
Based on accumulated WAA for this season up to 1938-09-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 8.73 | Bill Lee | 263.7 | CHN |
| +007+ | 8 | Paul Derringer | 282 | CIN |
| +017+ | 6.41 | Lou Fette | 229 | ATL |
| +018+ | 6.34 | Freddie Fitzsimmons | 185.7 | LAN |
| +020+ | 5.9 | Red Ruffing | 235.3 | NYA |
| +024+ | 5.57 | Johnny Vander Meer | 195.3 | CIN |
| +025+ | 5.55 | Russ Bauers | 224 | PIT |
| +026+ | 5.47 | Clay Bryant | 243.3 | CHN |
| +027+ | 5.36 | Thornton Lee | 218.3 | CHA |
| +029+ | 5.29 | Danny MacFayden | 196.3 | ATL |
| +030+ | 5.21 | Bill McGee | 203.7 | SLN |
| +031+ | 4.97 | Carl Hubbell | 179 | SFN |
| +036+ | 4.67 | Bob Klinger | 145.7 | PIT |
| +039+ | 4.43 | Dutch Leonard | 218.3 | MIN |
| +044+ | 4.19 | Charlie Root | 145 | CHN |
| +045+ | 4.05 | Ira Hutchinson | 132.7 | ATL |
| +047+ | 3.58 | Jim Tobin | 212.3 | PIT |
| +052+ | 3.44 | Jim Turner | 239.3 | ATL |
| +051+ | 3.44 | Lefty Gomez | 219 | NYA |
| +055+ | 3.18 | Al Benton | 85 | DET |
| +056+ | 3.04 | Johnny Rigney | 143 | CHA |
| +057+ | 3.01 | Lon Warneke | 187.7 | SLN |
| +058+ | 3 | Dick Errickson | 111.3 | ATL |
| +060+ | 2.95 | Ted Lyons | 177.7 | CHA |
| +061+ | 2.81 | Luke Hamlin | 217.7 | LAN |
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