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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Buster Scott | 2.106 | 1884-1888 | |
| 2 | Fred Cathey# | 2.498 | 1885-1887 | |
| 3 | Lew Townsel# | 2.510 | 1884-1887 | |
| 4 | Abel Rucker# | 2.559 | 1884-1885 | |
| 5 | Alonzo Fitzsimmons | 2.951 | 1885-1887 | |
| 6 | Lucian Robinson | 3.002 | 1887-1888 | |
| 7 | Lew Stiggers# | 3.026 | 1886-1890 | |
| 8 | David Roper# | 3.101 | 1888-1890 | |
| 9 | Pat Tuckett# | 3.124 | 1886-1887 | |
| 10 | Will Truitt# | 3.205 | 1886-1887 | |
| 11 | George Bauer# | 3.210 | 1886-1890 | |
| 12 | Jim Marchand# | 3.234 | 1886-1890 | |
| 13 | Ben OLeary# | 3.480 | 1886-1890 | |
| 14 | Matt Thomas | 3.703 | 1886-1888 | |
| 15 | Ike Silsby# | 3.827 | 1888-1890 | |
| 16 | Clar Endicott# | 3.913 | 1886-1890 | |
| 17 | Oliver Rafferty# | 3.937 | 1884-1890 | |
| 18 | Fred Wilder# | 3.968 | 1888-1890 | |
| 19 | Pierre Bouchard# | 4.057 | 1886-1890 | |
| 20 | Al Marshall# | 4.172 | 1886-1890 | |
| 21 | Hank Wolff# | 4.308 | 1886-1890 | |
| 22 | Ben Eberhardt# | 4.454 | 1886-1890 | |
| 23 | Walt Trask# | 4.862 | 1886-1886 | |
| 24 | Phil Blackburn# | 5.264 | 1886-1890 | |
| 25 | Ernest Beale# | 5.378 | 1886-1890 | |
| 26 | Walt Pelletier# | 5.558 | 1886-1890 | |
| 27 | Henry Young | 5.744 | 1888-1889 | |
| 28 | Bob Livingston# | 5.799 | 1888-1890 | |
| 29 | Levi Atkins# | 6.179 | 1886-1890 | |
| 30 | Jack Conley# | 6.243 | 1888-1890 | |
| 31 | Ray Bramlett# | 6.292 | 1886-1889 | |
| 32 | Tom Scott# | 9.784 | 1886-1890 | |
| 33 | Harry Hamilton# | 10.482 | 1889-1890 |
