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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Cody Bellinger# | .6341 | 2020-2020 | |
| 2 | Willians Astudillo# | .6098 | 2020-2020 | |
| 3 | Josh Donaldson# | .5946 | 2020-2020 | |
| 4 | Anthony Santander# | .5333 | 2020-2020 | |
| 5 | Max Muncy# | .5319 | 2020-2020 | |
| 6 | Michael Brantley# | .5294 | 2020-2020 | |
| 7 | Tommy Pham# | .5227 | 2020-2020 | |
| 8 | Nico Hoerner# | .4750 | 2020-2020 | |
| 9 | Charlie Blackmon# | .4375 | 2020-2020 | |
| 10 | Mike Trout# | .3913 | 2020-2020 | |
| 11 | Kolten Wong# | .3902 | 2020-2020 | |
| 12 | Amed Rosario# | .2889 | 2020-2020 | |
| 13 | Howie Kendrick# | .2667 | 2020-2020 | |
| 14 | Justin Turner# | .2286 | 2020-2020 |
