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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Roald Langstraat# | .6667 | 1955 | |
| 2 | Roger Tomei# | .6509 | 1955 | |
| 3 | Milos Govedarica# | .6207 | 1952 | |
| 4 | Zivota Nemanjic | .6178 | 1952 | |
| 5 | Andino Donatello# | .6166 | 1952 | |
| 6 | Bjorn Haas# | .6036 | 1953 | |
| 7 | Mario Orellana# | .5806 | 1953 | |
| 8 | Mike Strauss# | .5793 | 1953 | |
| 9 | Erik Eichler# | .5786 | 1952 | |
| 10 | Patrick Woods# | .5763 | 1954 | |
| 11 | Tristan Rio# | .5714 | 1955 | |
| 12 | Ryan Hutto# | .5681 | 1954 | |
| 13 | Christofferson Crumlin# | .5471 | 1954 | |
| 14 | Dominik Young# | .5319 | 1955 | |
| 15 | Norman May | .5112 | 1953 | |
| 16 | Arman Igumentsev# | .5109 | 1953 | |
| 17 | Harold Martindale# | .5060 | 1952 | |
| 18 | Efraim Elfring# | .4852 | 1954 | |
| 19 | Dominik Young# | .4792 | 1954 | |
| 20 | Harry Bassler# | .4752 | 1952 | |
| 21 | Mario Villa# | .4685 | 1955 | |
| 22 | Dan Cole# | .4651 | 1953 | |
| 23 | Jared Allison# | .4537 | 1953 | |
| 24 | Kevin Riddick# | .4462 | 1952 | |
| 25 | Enea Rubbi# | .4438 | 1952 | |
| 26 | Harry Bassler# | .4353 | 1953 | |
| 27 | Yi-ke Sun# | .4213 | 1953 | |
| 28 | Bob Curran | .3457 | 1954 |
