STAT-ERA-SEP -- All players in database
Regular season
| Primary |
| Name | Name | ERA |
| Howie Pollet* | Hudys | 1.90 |
| Stubby Overmire* | Blues | 1.90 |
| Whit Wyatt | Carp | 1.99 |
| Tommy Bridges | Natti Bohs | 2.09 |
| Harry Brecheen* | Muck Dogs | 2.26 |
| Spud Chandler | Grays | 2.29 |
| Bill Dietrich | Blues | 2.30 |
| Orval Grove | Blues | 2.37 |
| Jack Kraus* | Rugrats | 2.40 |
| Tex Hughson | Carp | 2.41 |
| Johnny Niggeling | Arsenal | 2.44 |
| Harry Gumbert | Hawks | 2.52 |
| Virgil Trucks | Arsenal | 2.54 |
| Dizzy Trout | Natti Bohs | 2.58 |
| Joe Dobson | Carp | 2.62 |
| Hal White | Panthers | 2.63 |
| Elmer Riddle | Panthers | 2.72 |
| Early Wynn | Rugrats | 2.72 |
| Red Barrett | Stampers | 2.73 |
| Max Butcher | Carp | 2.81 |
| Dick Barrett | Carp | 2.86 |
| Bob Muncrief | Natti Bohs | 2.87 |
| Butch Wensloff | Thunderbolts | 2.93 |
| Jim Tobin | Grays | 2.96 |
| Nate Andrews | Thunderbolts | 2.98 |
| Oscar Judd* | Hawks | 2.99 |
| Bobo Newsom | Blues | 3.00 |
| Max Lanier* | Grays | 3.02 |
| Hank Borowy | Thunderbolts | 3.06 |
| Nelson Potter | Royal Giants | 3.08 |
| Hi Bithorn | Stampers | 3.11 |
| Claude Passeau | Arsenal | 3.14 |
| Hank Wyse | Rugrats | 3.15 |
| Hal Newhouser* | Panthers | 3.17 |
| Jim Bagby | Stampers | 3.17 |
| Mort Cooper | Royal Giants | 3.18 |
| Rip Sewell | Aces | 3.19 |
| Russ Christopher | Muck Dogs | 3.20 |
| Paul Derringer | Hudys | 3.20 |
| Milo Candini | Blues | 3.24 |
| Schoolboy Rowe | Grays | 3.26 |
| Al Javery | Muck Dogs | 3.27 |
| Allie Reynolds | Hawks | 3.28 |
| Tiny Bonham | Stampers | 3.33 |
| Johnnie Wittig | Royal Giants | 3.33 |
| Jesse Flores | Grays | 3.40 |
| Cliff Melton* | Hudys | 3.42 |
| Wally Hebert* | Hawks | 3.54 |
| Ed Head | Hawks | 3.65 |
| Johnny Humphries | Rugrats | 3.68 |
| Buck Ross | Arsenal | 3.70 |
| Al Smith* | Aces | 3.71 |
| Denny Galehouse | Natti Bohs | 3.73 |
| Thornton Lee* | Rugrats | 3.75 |
| Si Johnson | Aces | 3.76 |
| Jim Mertz | Hudys | 3.81 |
| Curt Davis | Muck Dogs | 3.86 |
| Dick Newsome | Rugrats | 3.90 |
| Johnny Vander Meer* | Carp | 3.96 |
| Roger Wolff | Panthers | 3.98 |
| Rube Fischer | Arsenal | 3.99 |
| Dutch Leonard | Panthers | 3.99 |
| Vern Kennedy | Royal Giants | 4.07 |
| Bob Klinger | Aces | 4.08 |
| Bill Lee | Hawks | 4.18 |
| Bill Lohrman | Hudys | 4.27 |
| Ray Starr | Royal Giants | 4.27 |
| Ken Chase* | Hawks | 4.53 |
| Eddie Smith* | Muck Dogs | 4.89 |
| Hank Gornicki | Hudys | 5.12 |
| Don Black | Muck Dogs | 5.38 |
| Steve Sundra | Stampers | 5.68 |