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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OOBP | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Kwang-hyun Kim# | .2289 | 2025 | |
| 2 | Luke Weaver# | .2619 | 2021 | |
| 3 | Corbin Martin# | .2647 | 2019 | |
| 4 | Tyler Alexander# | .2727 | 2024 | |
| 5 | Brett Cecil | .2793 | 2013 | |
| 6 | Mike Vinson | .2794 | 2016 | |
| 7 | Brian Flynn | .2821 | 2014 | |
| 7 | Maximo Castillo# | .2821 | 2023 | |
| 9 | Gabriel Ynoa | .2830 | 2017 | |
| 10 | David Peterson# | .3088 | 2020 | |
| 11 | Rubby de la Rosa# | .3103 | 2014 | |
| 12 | Paolo Espino# | .3165 | 2017 | |
| 12 | Collin Wiles# | .3165 | 2023 | |
| 14 | Manny Banuelos# | .3182 | 2014 | |
| 15 | Brooks Raley# | .3375 | 2016 | |
| 15 | Austen Williams | .3375 | 2020 | |
| 17 | Emerson Hancock# | .3380 | 2023 | |
| 18 | John Gast | .3425 | 2017 | |
| 19 | Cody Morris# | .3429 | 2023 | |
| 20 | Jose Alvarez | .3452 | 2014 | |
| 21 | Jakob Junis# | .3494 | 2024 | |
| 22 | Trevor Rogers# | .3500 | 2025 | |
| 23 | Brent Honeywell Jr.# | .3506 | 2019 | |
| 24 | Jack Patterson | .3571 | 2020 | |
| 24 | Jordan Lyles# | .3571 | 2017 | |
| 26 | Alex Cobb# | .3578 | 2013 | |
| 27 | Randall Delgado | .3590 | 2013 | |
| 28 | Tobias Myers# | .3611 | 2024 | |
| 29 | Osvaldo Bido# | .3614 | 2024 | |
| 30 | Jack Flaherty# | .3733 | 2018 | |
| 31 | Brian Matusz | .3855 | 2013 | |
| 32 | Brady Rodgers | .3867 | 2017 | |
| 33 | Jesse Biddle | .3919 | 2015 | |
| 34 | Nathan Eovaldi# | .3936 | 2013 | |
| 35 | T.J. House | .4124 | 2017 | |
| 36 | Nicholas Kingham | .4375 | 2015 | |
| 37 | Nick Travieso | .4471 | 2016 | |
| 38 | Jarred Cosart | .4889 | 2013 |
