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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Michael Siani# | .5457 | 2020 | |
| 2 | Estevan Florial# | .5139 | 2019 | |
| 3 | Benny Montgomery# | .5055 | 2025 | |
| 4 | Gavin Cross# | .5013 | 2024 | |
| 5 | Tyler Austin# | .4902 | 2014 | |
| 6 | Thomas Milone# | .4857 | 2024 | |
| 7 | Everson Pereira# | .4745 | 2023 | |
| 8 | Victor Scott II# | .4661 | 2025 | |
| 9 | Johan Mieses# | .4617 | 2019 | |
| 10 | Jake Fraley# | .4538 | 2018 | |
| 11 | Corbin Carroll# | .4480 | 2022 | |
| 12 | Stuart Fairchild# | .4421 | 2019 | |
| 13 | Everson Pereira# | .4391 | 2022 | |
| 14 | Corey Rosier# | .4385 | 2023 | |
| 15 | Wilderd Patino# | .4345 | 2023 | |
| 16 | Bobby Boyd | .4269 | 2017 | |
| 17 | John Gourley | .4256 | 2016 | |
| 18 | Arbert Cipion# | .4135 | 2023 | |
| 19 | Josciel Veras | .4100 | 2018 | |
| 20 | Khalil Lee# | .3981 | 2020 | |
| 21 | Willy Garcia | .3951 | 2014 | |
| 22 | Brandon Lockridge# | .3936 | 2020 | |
| 23 | Michael Siani# | .3889 | 2021 | |
| 24 | Wilderd Patino# | .3880 | 2025 | |
| 25 | Jeff Roy | .3869 | 2016 | |
| 26 | Benny Montgomery# | .3838 | 2024 | |
| 27 | Luis Santana# | .3836 | 2021 | |
| 28 | D'Andre Toney | .3826 | 2013 | |
| 29 | Max White | .3603 | 2016 | |
| 30 | Josh Almonte | .3592 | 2017 | |
| 31 | Tyler James | .3529 | 2020 | |
| 32 | Pat Biondi | .3400 | 2017 | |
| 33 | Tyler James | .3342 | 2021 | |
| 34 | Jeison Rosario# | .3297 | 2023 | |
| 35 | Zach Nehrir | .3217 | 2017 | |
| 36 | Kentrell Dewitt | .3196 | 2014 | |
| 37 | Herschel Powell | .3101 | 2015 | |
| 38 | Kentrell Dewitt | .2789 | 2015 |
