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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Jesus Gelacio# | .5385 | 1954 | |
| 2 | Randall Quero# | .5298 | 1956 | |
| 3 | Ji-man Kong# | .5292 | 1958 | |
| 4 | Ryusuke Sugihara# | .5270 | 1957 | |
| 5 | Romain Larue# | .5256 | 1953 | |
| 6 | Paul Morin# | .5223 | 1957 | |
| 7 | Brian Vinyard# | .5212 | 1958 | |
| 8 | Nicholas Littmann# | .5039 | 1953 | |
| 9 | Jesus Gelacio# | .5000 | 1952 | |
| 10 | Ryusuke Sugihara# | .4925 | 1954 | |
| 11 | Jesus Gelacio# | .4804 | 1956 | |
| 12 | Jesus Gelacio# | .4763 | 1953 | |
| 13 | Randall Quero# | .4760 | 1957 | |
| 14 | Jamie McIntyre# | .4721 | 1952 | |
| 15 | Bob Foster# | .4618 | 1954 | |
| 16 | Nicholas Littmann# | .4586 | 1954 | |
| 17 | Willie Martinez# | .4552 | 1956 | |
| 18 | Ahvo Lampinen | .4510 | 1952 | |
| 19 | Willie Martinez# | .4498 | 1957 | |
| 20 | Serge Poulet# | .4460 | 1958 | |
| 21 | Billy Connell# | .4425 | 1953 | |
| 22 | Billy Connell# | .4424 | 1952 | |
| 23 | Andrew Leslie# | .4341 | 1958 | |
| 24 | Cipriano Furio# | .4286 | 1952 | |
| 25 | Hector Molina# | .4189 | 1952 | |
| 26 | Bob Foster# | .4184 | 1953 | |
| 27 | Paul Morin# | .4145 | 1956 | |
| 28 | Nick Garrity# | .4123 | 1952 | |
| 29 | Billy Connell# | .4069 | 1954 | |
| 30 | Harry Carr | .3934 | 1952 | |
| 31 | Bob Foster# | .3843 | 1955 | |
| 32 | Larry Gabriele# | .3745 | 1957 | |
| 33 | Josh Anderson | .3693 | 1952 |
