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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Edgar Kirkpatrick# | 1.098 | 1880 | |
| 2 | Buster Scott | 1.231 | 1878 | |
| 3 | Abel Kizzie# | 1.322 | 1881 | |
| 4 | Billy Roberson | 1.393 | 1879 | |
| 5 | Willie Davis | 1.409 | 1879 | |
| 6 | Cal Ames# | 1.422 | 1884 | |
| 7 | Martin Tucker | 1.447 | 1879 | |
| 8 | Pat Murphy# | 1.459 | 1876 | |
| 9 | Chas Duffey | 1.524 | 1876 | |
| 10 | Billy Crutchfield | 1.549 | 1883 | |
| 11 | Nate Chadwick# | 1.562 | 1884 | |
| 12 | Jim Cannon | 1.565 | 1878 | |
| 13 | Al Lynn# | 1.627 | 1884 | |
| 14 | Martin Tucker | 1.638 | 1880 | |
| 15 | John Richard | 1.668 | 1880 | |
| 16 | Elmer Manuel | 1.706 | 1879 | |
| 17 | Kevin McCart | 1.714 | 1876 | |
| 18 | Judson Perry | 1.735 | 1886 | |
| 19 | Paul Kennett | 1.802 | 1876 | |
| 20 | Jack Pendleton# | 1.826 | 1889 | |
| 21 | Johnny Wallace | 1.827 | 1886 | |
| 22 | Daniel Fallow | 1.852 | 1876 | |
| 23 | Clyde Wilkes# | 1.857 | 1888 | |
| 24 | Herbert Thayer# | 1.870 | 1886 | |
| 25 | Hiram Keys# | 1.879 | 1878 | |
| 26 | Dan LeBoeuf# | 1.881 | 1886 | |
| 27 | Gus Schneider# | 1.882 | 1888 | |
| 28 | Johnny Wallace | 1.897 | 1885 | |
| 29 | Samuel Schuyler | 1.901 | 1877 | |
| 29 | Willie Davis | 1.901 | 1880 | |
| 31 | Harry Hartmann# | 1.909 | 1890 | |
| 32 | Elmer Manuel | 1.916 | 1881 | |
| 33 | Will Ryan | 1.933 | 1878 | |
| 34 | Lew Anthony | 1.960 | 1886 | |
| 35 | Walt Lopp# | 1.965 | 1885 | |
| 36 | Billy Crutchfield | 1.968 | 1884 | |
| 37 | Herbert Thayer# | 1.969 | 1888 | |
| 38 | Leo Miller | 1.976 | 1876 | |
| 39 | Heck Williams | 1.981 | 1878 | |
| 40 | Lou Scudder# | 1.996 | 1888 | |
| 41 | Jack Pendleton# | 2.012 | 1890 | |
| 42 | Edgar Kirkpatrick# | 2.023 | 1885 | |
| 43 | Charlie Earle | 2.027 | 1880 | |
| 44 | Ray Flowers# | 2.060 | 1886 | |
| 45 | Cal Ames# | 2.063 | 1883 | |
| 46 | Abel Kizzie# | 2.072 | 1882 | |
| 47 | Henry Young | 2.099 | 1883 | |
| 48 | Billy Roberson | 2.103 | 1880 | |
| 49 | Will Bullock | 2.118 | 1880 | |
| 50 | Al Lynn# | 2.134 | 1883 | |
| 51 | Ezra Lockhart# | 2.146 | 1879 | |
| 52 | Joe Cook | 2.170 | 1880 | |
| 53 | Pat Rowe# | 2.173 | 1885 | |
| 54 | Dan LeBoeuf# | 2.175 | 1885 | |
| 55 | Michael Pitchford | 2.193 | 1876 | |
| 56 | Gus Schneider# | 2.195 | 1886 | |
| 57 | Fred Mathews | 2.220 | 1880 | |
| 58 | Elmer Manuel | 2.224 | 1880 | |
| 59 | Walt Merritt# | 2.233 | 1888 | |
| 60 | Henry Page | 2.276 | 1887 | |
| 61 | Arthur Durden | 2.282 | 1878 | |
| 62 | Rufus Riddick# | 2.285 | 1878 | |
| 62 | Walt Lopp# | 2.285 | 1881 | |
| 64 | Ike Silsby# | 2.301 | 1886 | |
| 64 | Nate Chadwick# | 2.301 | 1883 | |
| 66 | Will Truitt# | 2.318 | 1884 | |
| 67 | Al Kiernan# | 2.338 | 1881 | |
| 67 | Henry Page | 2.338 | 1883 | |
| 69 | Jim Cannon | 2.349 | 1880 | |
| 70 | Otis OBrien# | 2.361 | 1888 | |
| 71 | George Bryant | 2.365 | 1879 | |
| 72 | Nate Chadwick# | 2.369 | 1885 | |
| 73 | Otis Sheehan# | 2.382 | 1883 | |
| 74 | Tommy Johnson | 2.385 | 1886 | |
| 75 | Ike Shorter | 2.394 | 1888 | |
| 76 | Rufus Riddick# | 2.422 | 1882 | |
| 76 | Luther Smallwood | 2.422 | 1876 | |
| 78 | Darren Kelly | 2.424 | 1878 | |
| 79 | Silas Lawton# | 2.426 | 1886 | |
| 80 | Ike Sawyer# | 2.434 | 1890 | |
| 81 | Joe Chastain# | 2.437 | 1888 | |
| 82 | Ray Flowers# | 2.441 | 1890 | |
| 83 | Joe Ashford# | 2.445 | 1888 | |
| 84 | Henry Page | 2.447 | 1885 | |
| 85 | Otto Hinz# | 2.452 | 1890 | |
| 86 | Ezra Lockhart# | 2.459 | 1882 | |
| 87 | Ezra Lockhart# | 2.461 | 1880 | |
| 88 | Otis OBrien# | 2.465 | 1883 | |
| 89 | Cal Ames# | 2.471 | 1885 | |
| 90 | Herbert Thayer# | 2.474 | 1885 | |
| 91 | George Satterfield# | 2.479 | 1890 | |
| 92 | Otis OBrien# | 2.507 | 1884 | |
| 93 | Roy Blakely# | 2.510 | 1890 | |
| 94 | Michael Pitchford | 2.516 | 1882 | |
| 95 | Darren Kelly | 2.524 | 1880 | |
| 96 | Edgar Kirkpatrick# | 2.532 | 1889 | |
| 97 | Edgar Kirkpatrick# | 2.541 | 1881 | |
| 98 | Samuel Schuyler | 2.543 | 1878 | |
| 99 | Claude Coleman# | 2.562 | 1890 | |
| 100 | Cal Dearing# | 2.571 | 1884 |
