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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Paul Lawson# | 1.739 | 1890-1890 | |
| 2 | Hugh Quigley# | 2.095 | 1890-1890 | |
| 3 | Al Watson# | 2.147 | 1890-1890 | |
| 4 | Joe Chastain# | 2.335 | 1890-1890 | |
| 5 | Walt Merritt# | 2.342 | 1890-1890 | |
| 6 | Elmer Meier# | 2.497 | 1890-1890 | |
| 7 | Theo Crooks# | 2.573 | 1890-1890 | |
| 8 | Tom Volk# | 2.640 | 1890-1890 | |
| 9 | Lou Scudder# | 2.718 | 1890-1890 | |
| 10 | Otis OBrien# | 2.822 | 1890-1890 | |
| 11 | Hank McCann# | 2.885 | 1890-1890 | |
| 12 | Joe Ashford# | 3.026 | 1890-1890 | |
| 13 | Edgar Kirkpatrick# | 3.088 | 1890-1890 | |
| 14 | Bernard Bridges# | 3.170 | 1890-1890 | |
| 15 | Claude Newberry# | 3.171 | 1890-1890 | |
| 16 | Bernard Sellers# | 3.214 | 1890-1890 | |
| 17 | Will Drouin# | 3.470 | 1890-1890 | |
| 18 | George Beal# | 3.665 | 1890-1890 | |
| 19 | Ed Bannister# | 3.684 | 1890-1890 | |
| 20 | Cal Ames# | 3.813 | 1890-1890 | |
| 21 | George Mulligan# | 3.879 | 1890-1890 | |
| 22 | Ray Draper# | 3.973 | 1890-1890 | |
| 23 | George Copley# | 3.999 | 1890-1890 | |
| 24 | Bernard Holbrook# | 4.032 | 1890-1890 | |
| 25 | Nate Cavanagh# | 4.092 | 1890-1890 | |
| 26 | Al McDonough# | 4.123 | 1890-1890 | |
| 27 | Ed Baker# | 4.174 | 1890-1890 | |
| 28 | Hank Gibson# | 4.399 | 1890-1890 | |
| 29 | Lou McElroy# | 4.435 | 1890-1890 | |
| 30 | Gene Wofford# | 5.020 | 1890-1890 | |
| 31 | Martin Callahan# | 5.282 | 1890-1890 | |
| 32 | Charley Reinhardt# | 5.435 | 1890-1890 |
