STAT-ERA-JUL -- All players in database
Regular season
| Primary |
| Name | Name | ERA |
| Walter Johnson | Blue Flames | 1.85 |
| Larry Cheney | Perfectos | 2.01 |
| Lefty Tyler* | Marauders | 2.11 |
| Ed Walsh | Perfectos | 2.14 |
| Buck O'Brien | Maumees | 2.17 |
| Hugh Bedient | Sharks | 2.18 |
| Jim Baskette | Rail | 2.21 |
| Jeff Tesreau | Moondogs | 2.23 |
| Christy Mathewson | Patriots | 2.24 |
| George McConnell | Mutuals | 2.27 |
| Earl Hamilton* | Wildcats | 2.29 |
| Jack Coombs | Bombers | 2.36 |
| Joe Wood | Bombers | 2.37 |
| Buster Brown | Cyclones | 2.61 |
| Slim Sallee* | Wildcats | 2.65 |
| Babe Adams | Sharks | 2.68 |
| George Suggs | Mutuals | 2.69 |
| Claude Hendrix | Rail | 2.70 |
| Willie Mitchell* | Sharks | 2.76 |
| Doc White* | Wildcats | 2.83 |
| George Mogridge* | Mutuals | 2.87 |
| Eppa Rixey* | Sharks | 2.88 |
| Russ Ford | Perfectos | 3.01 |
| Elmer Knetzer | Blue Flames | 3.02 |
| Marty O'Toole | Maumees | 3.03 |
| Rube Marquard* | Bombers | 3.04 |
| Bob Harmon | Marauders | 3.07 |
| Jack Powell | Rail | 3.15 |
| Doc Crandall | Marauders | 3.18 |
| Hub Perdue | Mutuals | 3.19 |
| Ed Reulbach | Pisces | 3.23 |
| Elmer Brown | Barnstormers | 3.26 |
| Cliff Curtis | Patriots | 3.28 |
| Bob Groom | Moondogs | 3.30 |
| Tom Seaton | Bombers | 3.31 |
| Jimmy Lavender | Bombers | 3.32 |
| Ed Willett | Barnstormers | 3.33 |
| Bill Steele | Sharks | 3.35 |
| Cy Morgan | Mutuals | 3.38 |
| George Baumgardner | Perfectos | 3.38 |
| Bert Humphries | Wildcats | 3.39 |
| Charley Hall | Blue Flames | 3.40 |
| Otto Hess* | Rail | 3.42 |
| Jean Dubuc | Marauders | 3.42 |
| Jack Warhop | Barnstormers | 3.46 |
| Earl Moore | Blue Flames | 3.48 |
| Chief Bender | Maumees | 3.51 |
| Ad Brennan* | Barnstormers | 3.56 |
| Carl Cashion | Maumees | 3.63 |
| Fred Blanding | Barnstormers | 3.67 |
| Mack Allison | Pisces | 3.72 |
| Byron Houck | Moondogs | 3.79 |
| Hooks Wiltse* | Wildcats | 3.82 |
| Joe Benz | Maumees | 3.85 |
| Red Ames | Marauders | 3.86 |
| Art Fromme | Wildcats | 3.86 |
| Rube Benton* | Cyclones | 3.91 |
| Vean Gregg* | Patriots | 3.98 |
| Pete Alexander | Cyclones | 4.03 |
| Lefty Leifield* | Moondogs | 4.10 |
| Earl Yingling* | Rail | 4.13 |
| Ray Collins* | Pisces | 4.14 |
| Nap Rucker* | Pisces | 4.16 |
| Eddie Plank* | Cyclones | 4.18 |
| George Mullin | Blue Flames | 4.36 |
| Howie Camnitz | Cyclones | 4.57 |
| Joe Willis* | Patriots | 4.64 |
| Joe Engel* | Patriots | 4.69 |
| Hippo Vaughn* | Moondogs | 4.76 |
| Tom Hughes | Perfectos | 5.05 |
| Lew Richie | Maumees | 5.36 |
| Eddie Stack | Moondogs | 5.38 |
| George Kahler | Pisces | 5.42 |
| Rube Geyer | Patriots | 5.46 |