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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Paul Morin# | .8125 | 1955 | |
| 2 | Juan Contreras# | .7586 | 1955 | |
| 3 | Ron Ashton# | .6176 | 1955 | |
| 4 | Lorenzo Loza# | .6154 | 1955 | |
| 5 | Oscar Hernandez# | .5652 | 1955 | |
| 6 | Jack Jacobs# | .5588 | 1955 | |
| 7 | William Kelly# | .5484 | 1955 | |
| 8 | Manny Castillo# | .5357 | 1955 | |
| 9 | Grisha Galenkovsky# | .5200 | 1955 | |
| 10 | Jeirgif Shavkunov# | .4828 | 1955 | |
| 11 | Chia-liang Mai# | .4688 | 1955 | |
| 12 | Jelle Hofste# | .4286 | 1955 | |
| 13 | Shosei Iinuma# | .3182 | 1955 | |
| 14 | Yi-ke Sun# | .2222 | 1955 | |
| 15 | Ivan Stojsic# | .1860 | 1955 | |
| 16 | Dominik Young# | .1842 | 1955 |
