List of players with the highest K/9 for the 1931 baseball season
| Rank | Player Name | K/9 |
| 1 | Bump Hadley | 6.228 |
| 2 | Dazzy Vance | 6.187 |
| 3 | Bill Hallahan | 5.766 |
| 4 | Paul Derringer | 5.710 |
| 5 | Carl Hubbell | 5.625 |
| 6 | Lefty Gomez | 5.556 |
| 7 | Lefty Grove | 5.465 |
| 8 | Tommy Bridges | 5.462 |
| 9 | Red Ruffing | 5.013 |
| 10 | Hank Johnson | 4.865 |
| 10 | George Earnshaw | 4.865 |
| 12 | Charlie Root | 4.697 |
| 13 | Bill Walker | 4.555 |
| 14 | Carl Fischer | 4.524 |
| 15 | Pat Malone | 4.419 |
| 16 | Ray Benge | 4.263 |
| 17 | Ed Brandt | 4.032 |
| 18 | Wes Ferrell | 4.009 |
| 19 | Syl Johnson | 3.968 |
| 20 | Watty Clark | 3.707 |
| 21 | Vic Sorrell | 3.637 |
| 22 | Firpo Marberry | 3.616 |
| 23 | Jumbo Elliott | 3.578 |
| 24 | Art Herring | 3.491 |
| 25 | Rube Walberg | 3.278 |
