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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Buster Posey* | .3917 | 2015 | |
| 2 | Blake Swihart | .3798 | 2016 | |
| 3 | Buster Posey* | .3772 | 2019 | |
| 4 | Kevin Plawecki# | .3755 | 2018 | |
| 5 | Austin Allen# | .3728 | 2022 | |
| 6 | Buster Posey* | .3645 | 2017 | |
| 7 | Austin Allen# | .3630 | 2024 | |
| 8 | T.J. Collett# | .3628 | 2024 | |
| 9 | Víctor Jiménez# | .3568 | 2025 | |
| 10 | T.J. Collett# | .3495 | 2023 | |
| 11 | Blake Swihart | .3493 | 2018 | |
| 12 | Al Lee# | .3455 | 2024 | |
| 13 | Kevin Plawecki# | .3454 | 2017 | |
| 14 | Buster Posey* | .3411 | 2021 | |
| 15 | Reese McGuire# | .3397 | 2019 | |
| 16 | Salvador Perez | .3377 | 2018 | |
| 17 | Carlton Fisk# | .3374 | 2024 | |
| 18 | Austin Allen# | .3353 | 2020 | |
| 19 | Al Lee# | .3315 | 2025 | |
| 20 | Shohei Otani# | .3294 | 2020 | |
| 21 | Kevin Plawecki# | .3280 | 2016 | |
| 22 | Kevin Plawecki# | .3274 | 2019 | |
| 23 | Yasmani Grandal | .3271 | 2015 | |
| 24 | Robert Mullen# | .3270 | 2024 | |
| 24 | Salvador Perez | .3270 | 2019 | |
| 26 | Austin Allen# | .3244 | 2025 | |
| 27 | Tom J. Murphy# | .3226 | 2021 | |
| 28 | Guillermo Aviles# | .3221 | 2022 | |
| 29 | Yan Gomes | .3217 | 2016 | |
| 30 | T.J. Collett# | .3215 | 2025 | |
| 31 | Reese McGuire# | .3207 | 2020 | |
| 32 | Salvador Perez | .3191 | 2021 | |
| 33 | Salvador Perez | .3188 | 2022 | |
| 34 | Tom J. Murphy# | .3168 | 2022 | |
| 35 | Josmil Pinto | .3150 | 2017 | |
| 36 | Max Stassi# | .3126 | 2024 | |
| 37 | Reese McGuire# | .3108 | 2021 | |
| 38 | Max Stassi# | .3093 | 2022 | |
| 39 | Andrew Susac | .3086 | 2019 | |
| 40 | Jonathan Lucroy | .3051 | 2016 | |
| 41 | Chris Butler# | .3043 | 2025 | |
| 42 | Ryan Casteel# | .3008 | 2019 | |
| 43 | Yadier Molina | .3006 | 2017 | |
| 44 | Max Stassi# | .2993 | 2023 | |
| 45 | Justin O'Conner | .2971 | 2017 | |
| 46 | Oscar Hernandez | .2966 | 2018 | |
| 47 | Brian McCann | .2956 | 2015 | |
| 48 | Tom J. Murphy# | .2955 | 2023 | |
| 49 | Reese McGuire# | .2950 | 2022 | |
| 50 | Tom J. Murphy# | .2941 | 2020 | |
| 51 | Carlton Fisk# | .2932 | 2025 | |
| 51 | Kensuke Kondo | .2932 | 2020 | |
| 53 | Max Stassi# | .2911 | 2020 | |
| 54 | Josmil Pinto | .2908 | 2016 | |
| 55 | Tom J. Murphy# | .2894 | 2024 | |
| 56 | Max Stassi# | .2886 | 2017 | |
| 57 | Travis d'Arnaud | .2854 | 2016 | |
| 58 | Kensuke Kondo | .2838 | 2022 | |
| 59 | Salvador Perez | .2820 | 2020 | |
| 60 | Peter O'Brien | .2755 | 2017 | |
| 61 | Max Stassi# | .2682 | 2019 | |
| 62 | Tom J. Murphy# | .2664 | 2019 | |
| 63 | Evan Gattis | .2655 | 2015 | |
| 64 | Salvador Perez | .2648 | 2015 | |
| 65 | Yan Gomes | .2562 | 2015 | |
| 66 | Justin O'Conner | .2555 | 2018 | |
| 67 | Robert Mullen# | .2500 | 2025 | |
| 68 | Justin O'Conner | .2346 | 2020 |
