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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Oswald Knapp# | .6035 | 1957 | |
| 2 | Oswald Knapp# | .5622 | 1954 | |
| 3 | Yuji Nishimura# | .5325 | 1957 | |
| 4 | Yoshitomo Ono | .5314 | 1952 | |
| 5 | Alain Guillard# | .5283 | 1958 | |
| 6 | Andy Wilcox# | .5282 | 1958 | |
| 7 | Chris Sharkey# | .5255 | 1956 | |
| 8 | Shigeya Kawamura# | .5244 | 1952 | |
| 9 | Andrew Leslie# | .5216 | 1957 | |
| 10 | J.J. Francois# | .5204 | 1957 | |
| 11 | Aberto Grazioli# | .5065 | 1957 | |
| 12 | Jaden Edwards# | .5056 | 1956 | |
| 13 | Bruce Coburn | .4979 | 1955 | |
| 14 | Serge Poulet# | .4862 | 1956 | |
| 15 | Vitezslav Silhavy | .4836 | 1953 | |
| 16 | Alex Lopez | .4735 | 1953 | |
| 17 | Carlos Sanchez# | .4720 | 1957 | |
| 18 | Wessel de Joode# | .4625 | 1952 | |
| 19 | Roland Dickerson# | .4249 | 1958 | |
| 20 | Alfonso Salas# | .4224 | 1952 | |
| 21 | Charlie Watts | .4217 | 1954 | |
| 22 | Eric Line# | .4195 | 1952 | |
| 23 | Neil Catron# | .4178 | 1953 | |
| 24 | Justin Ryan# | .3880 | 1956 | |
| 25 | Hans Sorensen# | .3754 | 1958 | |
| 26 | Bradley van Ham | .3094 | 1955 |
