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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Yasmani Grandal# | .4842 | 2016-2025 | |
| 2 | Carlos Santana# | .4686 | 2010-2025 | |
| 3 | Evan Gattis | .4612 | 2014-2019 | |
| 4 | Jonathan Lucroy | .4574 | 2011-2022 | |
| 5 | Joe Mauer | .4571 | 2004-2018 | |
| 6 | Brian McCann | .4554 | 2006-2021 | |
| 7 | Mitch Garver# | .4551 | 2017-2025 | |
| 8 | Buster Posey | .4531 | 2010-2023 | |
| 9 | Travis D'Arnaud# | .4474 | 2010-2025 | |
| 10 | Willson Contreras# | .4457 | 2017-2025 | |
| 11 | J.T. Realmuto# | .4430 | 2016-2025 | |
| 12 | Christian Bethancourt# | .4416 | 2012-2025 | |
| 13 | Mike Zunino# | .4406 | 2016-2025 | |
| 14 | Salvador Perez# | .4389 | 2012-2025 | |
| 15 | Yan Gomes# | .4324 | 2010-2025 | |
| 15 | Will D. Smith# | .4324 | 2020-2025 | |
| 17 | Gary Sanchez# | .4321 | 2010-2025 | |
| 18 | Tom Murphy# | .4258 | 2017-2025 | |
| 19 | Devin Mesoraco | .4246 | 2011-2019 | |
| 20 | George Kottaras | .4211 | 2008-2015 | |
| 21 | Carlos Ruiz | .4196 | 2007-2017 | |
| 22 | Sean Murphy# | .4140 | 2020-2025 | |
| 23 | J.P. Arencibia | .4100 | 2010-2016 | |
| 24 | Kurt Suzuki | .4077 | 2008-2021 | |
| 25 | Matt Wieters | .4063 | 2010-2020 | |
| 26 | Miguel Montero | .4039 | 2007-2017 | |
| 27 | Omar Narvaez# | .4020 | 2019-2025 | |
| 28 | A.J. Pierzynski | .4016 | 2000-2016 | |
| 28 | Max Stassi# | .4016 | 2010-2025 | |
| 30 | William Contreras# | .4007 | 2022-2025 | |
| 31 | Jarrod Saltalamacchia | .3992 | 2008-2017 | |
| 32 | Yadier Molina | .3972 | 2005-2022 | |
| 33 | Wilson Ramos | .3964 | 2011-2022 | |
| 34 | Geovany Soto | .3955 | 2008-2017 | |
| 35 | Dioner Navarro | .3923 | 2006-2017 | |
| 36 | Austin Barnes# | .3917 | 2015-2025 | |
| 37 | Nick Hundley | .3902 | 2009-2019 | |
| 38 | Tyler Stephenson# | .3881 | 2021-2025 | |
| 39 | Carson Kelly# | .3848 | 2017-2025 | |
| 40 | Tyler Flowers | .3846 | 2012-2021 | |
| 41 | Robinson Chirinos | .3839 | 2011-2022 | |
| 42 | Russell Martin | .3778 | 2007-2020 | |
| 43 | Alex Avila | .3775 | 2010-2021 | |
| 44 | Victor Caratini# | .3754 | 2018-2025 | |
| 45 | Chris Iannetta | .3719 | 2007-2019 | |
| 46 | Francisco Cervelli | .3669 | 2010-2020 | |
| 47 | Hank Conger | .3661 | 2011-2017 | |
| 48 | Jason Castro | .3640 | 2011-2021 | |
| 49 | Roberto Perez | .3584 | 2010-2023 | |
| 50 | Christian Vazquez# | .3378 | 2010-2025 | |
| 51 | Ryan Hanigan | .3326 | 2010-2018 | |
| 52 | Austin Hedges# | .3199 | 2016-2025 |
