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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Willson Contreras# | .5560 | 2023 | |
| 2 | Will Smith# | .5336 | 2023 | |
| 3 | Will Smith# | .5094 | 2021 | |
| 4 | Mitch Garver# | .5031 | 2020 | |
| 5 | J.T. Realmuto# | .4881 | 2023 | |
| 6 | Miguel Amaya# | .4854 | 2022 | |
| 7 | Adley Rutschman# | .4809 | 2022 | |
| 8 | Tyler Stephenson# | .4778 | 2022 | |
| 9 | Salvador Perez# | .4777 | 2022 | |
| 10 | Keibert Ruiz# | .4669 | 2020 | |
| 11 | Adley Rutschman# | .4667 | 2023 | |
| 12 | William Contreras# | .4662 | 2023 | |
| 13 | Tyler Stephenson# | .4644 | 2023 | |
| 14 | Mike Zunino# | .4639 | 2022 | |
| 15 | Victor Caratini# | .4567 | 2020 | |
| 16 | Willson Contreras# | .4459 | 2020 | |
| 16 | Victor Caratini# | .4459 | 2019 | |
| 18 | Gary Sanchez# | .4383 | 2019 | |
| 19 | Buster Posey | .3992 | 2019 | |
| 20 | Will Smith# | .3926 | 2020 | |
| 21 | Yasmani Grandal# | .3788 | 2021 | |
| 22 | Miguel Amaya# | .3671 | 2023 | |
| 23 | Christian Vazquez# | .3229 | 2021 |
