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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Jemke Claessens# | .7339 | 1955 | |
| 2 | Keith Harris# | .6754 | 1954 | |
| 3 | Darragh MacMahon# | .6650 | 1953 | |
| 4 | Ratko Zupljanin | .6142 | 1952 | |
| 5 | Mark Henseler# | .6134 | 1958 | |
| 6 | Haruo Mitani# | .5810 | 1958 | |
| 7 | Silvério Isaas# | .5809 | 1957 | |
| 8 | Sreten Stojadinovic | .5806 | 1952 | |
| 9 | John Swearingen# | .5741 | 1955 | |
| 10 | Eric Houston# | .5725 | 1954 | |
| 11 | Alexandr Svec# | .5632 | 1952 | |
| 12 | Derek Funk# | .5607 | 1952 | |
| 13 | Joel Kinser# | .5596 | 1955 | |
| 14 | John Swearingen# | .5586 | 1958 | |
| 15 | Alje Rodriguez# | .5577 | 1956 | |
| 16 | Cameron Cichetti# | .5496 | 1956 | |
| 17 | Shane Tischler# | .5476 | 1953 | |
| 18 | Cameron Cichetti# | .5447 | 1955 | |
| 19 | Laertes Souflas | .5253 | 1952 | |
| 20 | Jose Ramos# | .5198 | 1954 | |
| 21 | Jose Rivera# | .5109 | 1954 | |
| 22 | Zhong-qi Eng# | .4839 | 1957 | |
| 23 | Samuel Ceraolo# | .4813 | 1953 | |
| 24 | Eric Houston# | .4803 | 1953 | |
| 25 | Seung-jun Wang# | .4667 | 1958 | |
| 26 | Nick Bourgeois# | .4643 | 1954 | |
| 27 | Samuel Ceraolo# | .4597 | 1954 | |
| 28 | Pedro Rodriguez# | .4574 | 1954 | |
| 29 | Bill Rodriguez# | .4435 | 1956 | |
| 30 | Erik Parrish# | .4292 | 1953 | |
| 31 | Tsutomu Kawashima | .4199 | 1952 | |
| 32 | Oscar Garcia# | .3925 | 1956 | |
| 33 | Hector de Leon# | .3770 | 1953 | |
| 34 | Troy Ahern | .3592 | 1953 | |
| 35 | Jean-Loup Pasquet# | .3578 | 1957 |
