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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Fred Cathey# | 1.532 | 1885 | |
| 2 | Buster Scott | 1.544 | 1884 | |
| 3 | Fred Wilder# | 1.611 | 1890 | |
| 4 | Lucian Robinson | 1.726 | 1888 | |
| 5 | Joe Whiteside# | 1.812 | 1884 | |
| 6 | David Roper# | 1.826 | 1890 | |
| 7 | Abel Rucker# | 1.843 | 1884 | |
| 8 | Lew Townsel# | 1.915 | 1887 | |
| 9 | Alonzo Fitzsimmons | 1.939 | 1885 | |
| 10 | Jim Marchand# | 2.003 | 1888 | |
| 11 | Jacob Lewis | 2.054 | 1885 | |
| 11 | Lew Townsel# | 2.054 | 1885 | |
| 13 | Lew Stiggers# | 2.155 | 1890 | |
| 14 | George Bauer# | 2.192 | 1890 | |
| 15 | Ben OLeary# | 2.250 | 1890 | |
| 16 | Silas Lawton# | 2.270 | 1884 | |
| 17 | Pat Tuckett# | 2.280 | 1887 | |
| 18 | Lew Stiggers# | 2.281 | 1888 | |
| 19 | Hank Wolff# | 2.334 | 1888 | |
| 20 | Buster Scott | 2.359 | 1888 | |
| 21 | Lew Townsel# | 2.469 | 1884 | |
| 22 | Alonzo Fitzsimmons | 2.526 | 1886 | |
| 23 | Ben OLeary# | 2.537 | 1888 | |
| 24 | George Bauer# | 2.575 | 1887 | |
| 25 | George Bauer# | 2.659 | 1888 | |
| 26 | Oliver Rafferty# | 2.679 | 1888 | |
| 27 | Jim Marchand# | 2.687 | 1887 | |
| 28 | Al Marshall# | 2.706 | 1888 | |
| 29 | David Roper# | 2.738 | 1888 | |
| 30 | Bob Livingston# | 2.743 | 1888 | |
| 31 | Oliver Rafferty# | 2.789 | 1890 | |
| 32 | Fred Cathey# | 2.798 | 1886 | |
| 33 | Fred Wilder# | 2.851 | 1888 | |
| 34 | Ike Silsby# | 2.862 | 1888 | |
| 35 | Fred Cathey# | 2.865 | 1887 | |
| 36 | Al Marshall# | 2.885 | 1887 | |
| 37 | Jim Marchand# | 2.888 | 1890 | |
| 38 | Lew Stiggers# | 2.962 | 1887 | |
| 39 | Matt Thomas | 2.967 | 1887 | |
| 40 | Clar Endicott# | 3.056 | 1888 | |
| 41 | Will Truitt# | 3.115 | 1887 | |
| 42 | Charley Kearns# | 3.141 | 1892 | |
| 43 | Ernest Beale# | 3.195 | 1888 | |
| 44 | George Bauer# | 3.221 | 1889 | |
| 45 | Lew Stiggers# | 3.223 | 1889 | |
| 46 | Nate Pickett# | 3.252 | 1884 | |
| 47 | Ben OLeary# | 3.279 | 1891 | |
| 48 | Lew Townsel# | 3.306 | 1886 | |
| 49 | Clar Endicott# | 3.387 | 1890 | |
| 50 | Clar Endicott# | 3.388 | 1887 | |
| 51 | Ben OLeary# | 3.410 | 1887 | |
| 52 | Jack Conley# | 3.461 | 1888 | |
| 53 | John Dobbs# | 3.491 | 1893 | |
| 54 | Oliver Rafferty# | 3.503 | 1887 | |
| 55 | Cal Ames# | 3.526 | 1891 | |
| 56 | Hank Wolff# | 3.550 | 1890 | |
| 57 | Frank Gibson# | 3.623 | 1892 | |
| 58 | Ike Silsby# | 3.642 | 1890 | |
| 59 | Abel Rucker# | 3.670 | 1885 | |
| 60 | Charley Pfeiffer# | 3.680 | 1892 | |
| 61 | Hank Gibson# | 3.725 | 1891 | |
| 62 | Hiram Whitman | 3.726 | 1888 | |
| 63 | Robert Stevens# | 3.732 | 1892 | |
| 64 | Denny McClister# | 3.762 | 1891 | |
| 65 | Clar Endicott# | 3.775 | 1889 | |
| 66 | Pat Tuckett# | 3.829 | 1886 | |
| 67 | Oliver Rafferty# | 3.862 | 1885 | |
| 68 | Hank Wolff# | 3.865 | 1887 | |
| 69 | Henry Young | 3.902 | 1888 | |
| 70 | Ike Silsby# | 4.048 | 1891 | |
| 71 | George Bauer# | 4.108 | 1891 | |
| 72 | Charley Reinhardt# | 4.121 | 1893 | |
| 73 | Vic Smith# | 4.123 | 1892 | |
| 74 | David Roper# | 4.142 | 1891 | |
| 75 | Ike Silsby# | 4.174 | 1893 | |
| 76 | Al Marshall# | 4.208 | 1891 | |
| 77 | Oliver Rafferty# | 4.238 | 1891 | |
| 78 | Alonzo Fitzsimmons | 4.295 | 1887 | |
| 79 | Jim Marchand# | 4.311 | 1889 | |
| 80 | Oliver Rafferty# | 4.332 | 1893 | |
| 81 | Al Marshall# | 4.381 | 1890 | |
| 82 | Al Marshall# | 4.404 | 1886 | |
| 83 | Denny McClister# | 4.417 | 1892 | |
| 84 | Walt Pelletier# | 4.436 | 1890 | |
| 85 | Phil Blackburn# | 4.440 | 1887 | |
| 86 | Charley Pfeiffer# | 4.442 | 1893 | |
| 87 | John Sullivan# | 4.457 | 1892 | |
| 88 | Pat Rowe# | 4.465 | 1886 | |
| 89 | Walt Pelletier# | 4.492 | 1893 | |
| 90 | Lew Stiggers# | 4.504 | 1886 | |
| 91 | David Roper# | 4.526 | 1892 | |
| 92 | Charley Reinhardt# | 4.538 | 1892 | |
| 93 | Ike Silsby# | 4.577 | 1892 | |
| 94 | Vic Smith# | 4.597 | 1893 | |
| 95 | Ernest Beale# | 4.612 | 1890 | |
| 96 | Lou Scudder# | 4.613 | 1891 | |
| 97 | Edgar Kirkpatrick | 4.621 | 1891 | |
| 98 | Levi Atkins# | 4.630 | 1890 | |
| 99 | Charley Kearns# | 4.684 | 1893 | |
| 100 | Ben OLeary# | 4.688 | 1893 |
