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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Evan Gattis# | .4564 | 2016 | |
| 2 | Matt Wieters# | .4176 | 2016 | |
| 3 | Buster Posey# | .4163 | 2016 | |
| 4 | Kevin Plawecki# | .4102 | 2016 | |
| 5 | Austin Barnes# | .3890 | 2016 | |
| 6 | Travis d'Arnaud# | .3836 | 2016 | |
| 7 | Jonathan Lucroy# | .3540 | 2016 | |
| 8 | Christian Bethancourt# | .3308 | 2016 | |
| 9 | Welington Castillo# | .3155 | 2016 | |
| 10 | Yan Gomes# | .3050 | 2016 |
