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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Joe Mauer | .3922 | 2004-2018 | |
| 2 | Carlos Santana# | .3826 | 2010-2025 | |
| 3 | Buster Posey | .3697 | 2010-2023 | |
| 4 | Carlos Ruiz | .3602 | 2007-2017 | |
| 5 | Jonathan Lucroy | .3565 | 2011-2022 | |
| 6 | Yasmani Grandal# | .3483 | 2016-2025 | |
| 7 | Brian McCann | .3480 | 2006-2021 | |
| 8 | Alex Avila | .3467 | 2010-2021 | |
| 9 | Omar Narvaez# | .3436 | 2019-2025 | |
| 10 | Ryan Hanigan | .3427 | 2010-2018 | |
| 11 | Russell Martin | .3417 | 2007-2020 | |
| 12 | Mitch Garver# | .3382 | 2017-2025 | |
| 13 | Chris Iannetta | .3378 | 2007-2019 | |
| 14 | Kurt Suzuki | .3354 | 2008-2021 | |
| 15 | Francisco Cervelli | .3349 | 2010-2020 | |
| 16 | Miguel Montero | .3342 | 2007-2017 | |
| 17 | Yadier Molina | .3328 | 2005-2022 | |
| 18 | Carson Kelly# | .3274 | 2017-2025 | |
| 19 | Matt Wieters | .3273 | 2010-2020 | |
| 20 | Willson Contreras# | .3259 | 2017-2025 | |
| 21 | Dioner Navarro | .3236 | 2006-2017 | |
| 22 | Travis D'Arnaud# | .3232 | 2010-2025 | |
| 23 | Austin Barnes# | .3205 | 2015-2025 | |
| 24 | J.T. Realmuto# | .3195 | 2016-2025 | |
| 25 | Victor Caratini# | .3187 | 2018-2025 | |
| 26 | Will D. Smith# | .3182 | 2020-2025 | |
| 27 | A.J. Pierzynski | .3166 | 2000-2016 | |
| 28 | Jarrod Saltalamacchia | .3163 | 2008-2017 | |
| 29 | Tyler Flowers | .3136 | 2012-2021 | |
| 30 | George Kottaras | .3135 | 2008-2015 | |
| 31 | Wilson Ramos | .3101 | 2011-2022 | |
| 32 | Evan Gattis | .3090 | 2014-2019 | |
| 33 | Hank Conger | .3086 | 2011-2017 | |
| 34 | Devin Mesoraco | .3085 | 2011-2019 | |
| 35 | Max Stassi# | .3074 | 2010-2025 | |
| 36 | Geovany Soto | .3071 | 2008-2017 | |
| 37 | Jason Castro | .3057 | 2011-2021 | |
| 38 | Roberto Perez | .3039 | 2010-2023 | |
| 39 | Robinson Chirinos | .3037 | 2011-2022 | |
| 40 | Nick Hundley | .3025 | 2009-2019 | |
| 41 | Gary Sanchez# | .2960 | 2010-2025 | |
| 42 | Sean Murphy# | .2953 | 2020-2025 | |
| 43 | Christian Bethancourt# | .2952 | 2012-2025 | |
| 44 | Salvador Perez# | .2947 | 2012-2025 | |
| 45 | Mike Zunino# | .2905 | 2016-2025 | |
| 46 | Yan Gomes# | .2902 | 2010-2025 | |
| 47 | Christian Vazquez# | .2870 | 2010-2025 | |
| 48 | Tom Murphy# | .2865 | 2017-2025 | |
| 49 | J.P. Arencibia | .2738 | 2010-2016 | |
| 50 | Austin Hedges# | .2686 | 2016-2025 |
