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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Alfred Mercier# | .6933 | 1887 | |
| 2 | Fred Lorraine# | .5250 | 1886 | |
| 3 | John Bates | .5036 | 1882 | |
| 4 | Alfred Mercier# | .4955 | 1885 | |
| 5 | Alfred Mercier# | .4864 | 1888 | |
| 6 | Will Kuehn# | .4825 | 1890 | |
| 7 | Will Kuehn# | .4772 | 1889 | |
| 8 | Walt Harkness# | .4596 | 1886 | |
| 9 | Will Kuehn# | .4576 | 1887 | |
| 10 | Otis Watters# | .4544 | 1885 | |
| 11 | Otis Watters# | .4529 | 1886 | |
| 12 | Clar Schultz# | .4469 | 1889 | |
| 13 | George Ellis | .4455 | 1886 | |
| 14 | Lou Kerr# | .4454 | 1884 | |
| 15 | George Dietrich# | .4416 | 1887 | |
| 16 | Ray Hayden# | .4403 | 1887 | |
| 17 | Dave Greenblatt | .4220 | 1885 | |
| 18 | Charley Keeler# | .4153 | 1890 | |
| 19 | Lew Schroeder# | .4110 | 1886 | |
| 20 | Walt Harkness# | .4088 | 1888 | |
| 21 | Alfred Charbonneau# | .4081 | 1890 | |
| 22 | Nate Locke# | .4056 | 1888 | |
| 23 | George Dietrich# | .4051 | 1889 | |
| 24 | Dave Greenblatt | .4003 | 1886 | |
| 25 | Nate Locke# | .3966 | 1883 | |
| 26 | Nate Locke# | .3961 | 1887 | |
| 27 | George Maroney# | .3913 | 1887 | |
| 28 | Jack Rawlins# | .3889 | 1883 | |
| 29 | Frederic Kennedy | .3796 | 1882 | |
| 30 | Otis Watters# | .3791 | 1884 | |
| 31 | Charley Keeler# | .3782 | 1889 | |
| 32 | Danny Leary | .3712 | 1884 | |
| 33 | Roy Becker# | .3704 | 1883 | |
| 34 | Dave Greenblatt | .3636 | 1884 | |
| 34 | Tommy Milligan | .3636 | 1887 | |
| 36 | Charley Vinton# | .3593 | 1888 | |
| 37 | Bob Perry# | .3577 | 1890 | |
| 38 | Will Kuehn# | .3504 | 1888 | |
| 39 | Abraham Martin | .3486 | 1889 | |
| 40 | Walt Harkness# | .3466 | 1889 | |
| 41 | Lou Kerr# | .3432 | 1883 | |
| 42 | Ben Hyde# | .3422 | 1887 | |
| 43 | Vic VanAlstyne# | .3400 | 1883 | |
| 44 | Ben Hyde# | .3388 | 1889 | |
| 45 | Clar Malloy# | .3377 | 1890 | |
| 46 | Nate Vaughn# | .3375 | 1882 | |
| 47 | Vic VanAlstyne# | .3361 | 1885 | |
| 48 | Wilbur Jordan | .3333 | 1882 | |
| 49 | Oscar Foster# | .3287 | 1884 | |
| 50 | Joe Foster | .3133 | 1888 | |
| 51 | Ben Hyde# | .3131 | 1890 | |
| 52 | Tim Clements | .3118 | 1884 | |
| 53 | Pat Hopkins# | .3089 | 1890 | |
| 54 | Hugh Harley | .3075 | 1885 | |
| 55 | Charley Lucas# | .3011 | 1889 | |
| 56 | Alfred Marks# | .2974 | 1884 | |
| 57 | Johnny King | .2895 | 1883 | |
| 58 | Lew Colman# | .2839 | 1882 | |
| 59 | Lew Schroeder# | .2829 | 1885 | |
| 60 | Vic VanAlstyne# | .2781 | 1890 | |
| 61 | Vic VanAlstyne# | .2774 | 1882 | |
| 62 | Hiram Neely# | .2706 | 1883 | |
| 63 | Ernest Hathaway# | .2693 | 1886 | |
| 64 | Ben Hyde# | .2651 | 1886 | |
| 65 | George Dietrich# | .2510 | 1888 | |
| 66 | Frederic Kennedy | .2457 | 1884 |
