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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Frank McGrath# | .6462 | 1894 | |
| 2 | Mike Maguire# | .6139 | 1900 | |
| 3 | Frank McGrath# | .6018 | 1896 | |
| 4 | Frank McGrath# | .5846 | 1895 | |
| 5 | Frank McGrath# | .5802 | 1897 | |
| 6 | Tom Moran | .5727 | 1882 | |
| 7 | Oscar Engel | .5687 | 1895 | |
| 8 | Roy Malone# | .5664 | 1894 | |
| 9 | Oscar Engel | .5645 | 1894 | |
| 10 | Mike Maguire# | .5552 | 1899 | |
| 11 | Roy Malone# | .5481 | 1896 | |
| 12 | Mike Maguire# | .5459 | 1901 | |
| 13 | Mike Maguire# | .5439 | 1898 | |
| 14 | Oscar Engel | .5280 | 1893 | |
| 15 | Mike Maguire# | .5210 | 1902 | |
| 16 | Horace Nolan | .5145 | 1882 | |
| 17 | Frank McGrath# | .5123 | 1893 | |
| 18 | Frank McGrath# | .5105 | 1899 | |
| 19 | Mike Maguire# | .5075 | 1903 | |
| 20 | Otis Collier | .5036 | 1876 | |
| 21 | Roy Malone# | .4951 | 1897 | |
| 22 | Frank McGrath# | .4867 | 1898 | |
| 23 | Will Hughes# | .4859 | 1896 | |
| 24 | Will Hughes# | .4814 | 1894 | |
| 25 | Frank McGrath# | .4807 | 1902 | |
| 26 | Oscar Engel | .4804 | 1892 | |
| 27 | Art Penick | .4721 | 1887 | |
| 28 | Steve Airington | .4665 | 1884 | |
| 29 | Clar Booker | .4639 | 1894 | |
| 30 | Roy Malone# | .4633 | 1895 | |
| 31 | Joe Cook | .4624 | 1878 | |
| 32 | Jim Vickman# | .4583 | 1901 | |
| 33 | Jack Cassell | .4558 | 1881 | |
| 34 | Martin Jarvis | .4545 | 1879 | |
| 35 | Oscar Engel | .4517 | 1897 | |
| 36 | Jack Cassell | .4463 | 1882 | |
| 37 | Frank Priest# | .4458 | 1906 | |
| 38 | George Merritt | .4423 | 1885 | |
| 39 | George Merritt | .4417 | 1886 | |
| 40 | Abel Schmidt | .4415 | 1886 | |
| 41 | Art Penick | .4410 | 1886 | |
| 42 | Theo Black | .4396 | 1887 | |
| 43 | Alfred Cole | .4395 | 1894 | |
| 44 | Will Hughes# | .4389 | 1895 | |
| 45 | Phil Goff | .4375 | 1879 | |
| 46 | Mike Maguire# | .4371 | 1905 | |
| 47 | Alfred Cole | .4356 | 1897 | |
| 48 | Mike Maguire# | .4351 | 1904 | |
| 49 | Phil Goff | .4312 | 1881 | |
| 50 | Phil Goff | .4311 | 1884 | |
| 51 | Clarence Tate | .4307 | 1888 | |
| 52 | Steve Airington | .4306 | 1887 | |
| 52 | Silas Keane | .4306 | 1897 | |
| 54 | Glenn Coffen# | .4277 | 1906 | |
| 55 | John Martin | .4256 | 1877 | |
| 56 | Oscar Engel | .4239 | 1896 | |
| 57 | Walt Koenig | .4226 | 1896 | |
| 58 | Cyrus Pittman | .4221 | 1886 | |
| 59 | Henri Bastien | .4215 | 1894 | |
| 60 | Frank McGrath# | .4198 | 1906 | |
| 61 | John Martin | .4188 | 1884 | |
| 62 | Phil Goff | .4179 | 1878 | |
| 63 | Phil Goff | .4174 | 1882 | |
| 64 | George Corbett# | .4146 | 1902 | |
| 65 | Walt Koenig | .4137 | 1894 | |
| 66 | Frank McGrath# | .4125 | 1904 | |
| 67 | Silas Hartley | .4101 | 1880 | |
| 68 | Art Penick | .4088 | 1889 | |
| 69 | John Martin | .4060 | 1883 | |
| 70 | Clar Booker | .4035 | 1891 | |
| 71 | Otto Keating | .3988 | 1894 | |
| 72 | George Rooney | .3983 | 1891 | |
| 72 | Oscar Engel | .3983 | 1899 | |
| 74 | Percy Fretwell | .3982 | 1899 | |
| 75 | Percy Fretwell | .3973 | 1894 | |
| 76 | Dave Miller# | .3964 | 1905 | |
| 77 | Sam George | .3942 | 1876 | |
| 78 | Clar Booker | .3940 | 1896 | |
| 79 | Alfred Cole | .3914 | 1890 | |
| 80 | George Corbett# | .3912 | 1901 | |
| 80 | Otto Keating | .3912 | 1895 | |
| 82 | Cal Middleton | .3906 | 1897 | |
| 83 | George Merritt | .3904 | 1887 | |
| 84 | Mike Gould# | .3898 | 1907 | |
| 85 | Dave Miller# | .3888 | 1906 | |
| 86 | Theo Black | .3884 | 1888 | |
| 87 | Phil Goff | .3880 | 1883 | |
| 88 | Lou Curzon | .3875 | 1889 | |
| 89 | Clarence Tate | .3874 | 1887 | |
| 90 | Lou Curzon | .3864 | 1890 | |
| 90 | Frank Priest# | .3864 | 1907 | |
| 92 | Dave Miller# | .3835 | 1903 | |
| 93 | Ray Lorenz | .3832 | 1894 | |
| 94 | Frank McGrath# | .3831 | 1905 | |
| 95 | Alfred Cole | .3828 | 1899 | |
| 96 | George Merritt | .3822 | 1889 | |
| 97 | Walt Koenig | .3819 | 1895 | |
| 98 | Cal Middleton | .3814 | 1896 | |
| 99 | Hank Seidel | .3796 | 1887 | |
| 100 | Ken Tarran | .3792 | 1878 |
