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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Daniel Martínez# | .5183 | 2015 | |
| 2 | Anastasio Vázquez# | .5119 | 2015 | |
| 3 | Sidney Russell# | .4957 | 2015 | |
| 4 | Duane Hill# | .4918 | 2015 | |
| 5 | Jimmy Mays# | .4476 | 2015 | |
| 6 | Héctor Gutiérrez# | .4427 | 2015 | |
| 7 | Juan Ramos# | .4170 | 2015 | |
| 8 | Carl Joyce# | .4129 | 2015 | |
| 9 | Joel Pickett# | .4115 | 2015 | |
| 10 | Doug Chandler# | .4097 | 2015 | |
| 11 | John Rodríguez# | .3563 | 2015 |
