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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Pat Zimmerman | .4918 | 2024-2031 | |
| 2 | Matt Proctor | .4808 | 2007-2014 | |
| 3 | John Church# | .4545 | 2044-2049 | |
| 4 | Douglas Shields | .4479 | 2007-2015 | |
| 5 | Andrew Erwin | .4419 | 2007-2013 | |
| 5 | Miguel Peña# | .4419 | 2042-2049 | |
| 7 | John Peterson | .4400 | 2022-2034 | |
| 8 | Buck Hester | .4390 | 2007-2010 | |
| 9 | Lewis Barr | .4375 | 2023-2034 | |
| 9 | Jorge Campos | .4375 | 2038-2047 | |
| 9 | Albert López | .4375 | 2014-2019 | |
| 12 | Jason Bullock | .4364 | 2007-2017 | |
| 13 | Victor Gaines# | .4349 | 2034-2049 | |
| 14 | Ed Murray | .4348 | 2027-2037 | |
| 15 | Eduardo Ángel# | .4334 | 2043-2049 | |
| 16 | Randy Wiggins | .4333 | 2030-2038 | |
| 17 | Arthur Winram | .4318 | 2038-2044 | |
| 18 | Ryan Drake | .4300 | 2024-2032 | |
| 19 | Vicente Bueno | .4286 | 2022-2027 | |
| 19 | Ryan Holden# | .4286 | 2047-2049 | |
| 19 | Parker Morrow | .4286 | 2007-2018 | |
| 19 | Jerry Young | .4286 | 2032-2042 | |
| 23 | Adam Wilder | .4267 | 2007-2010 | |
| 24 | Howard Frazier | .4262 | 2007-2011 | |
| 25 | Cipriano Pérez# | .4251 | 2033-2049 | |
| 26 | Alexander Clayton | .4250 | 2007-2010 | |
| 27 | Edward Bennett | .4235 | 2029-2045 | |
| 28 | Stan Harris# | .4220 | 2034-2049 | |
| 29 | Albert Morgan | .4219 | 2023-2032 | |
| 30 | Keith Beard | .4216 | 2023-2041 | |
| 31 | Roberto Cruz# | .4205 | 2038-2048 | |
| 32 | Manny Sánchez# | .4194 | 2043-2049 | |
| 33 | Justin Snyder# | .4172 | 2040-2049 | |
| 34 | Felipe García# | .4167 | 2041-2049 | |
| 34 | Ramón Hernández | .4167 | 2014-2023 | |
| 36 | Júlio Serra | .4162 | 2031-2048 | |
| 37 | Thomas English | .4138 | 2034-2046 | |
| 38 | Johnny Marshall | .4130 | 2034-2042 | |
| 39 | Mauro Trejo# | .4120 | 2043-2049 | |
| 40 | Luis Cruz | .4118 | 2029-2036 | |
| 40 | Mark Weaver | .4118 | 2034-2045 | |
| 42 | Julián Madrid* | .4111 | 2016-2033 | |
| 43 | Bill Davis | .4086 | 2012-2022 | |
| 44 | Chet Harden | .4082 | 2009-2015 | |
| 45 | Pedro Zavala# | .4079 | 2031-2049 | |
| 46 | Francisco Cortéz | .4070 | 2007-2015 | |
| 47 | Kevin Beasley | .4065 | 2018-2023 | |
| 48 | Carlos Bernal | .4062 | 2040-2047 | |
| 49 | Danny Law# | .4054 | 2043-2049 | |
| 50 | Glenn Buckley# | .4052 | 2040-2049 | |
| 51 | Mel Fields | .4050 | 2007-2013 | |
| 52 | Rich Smith | .4043 | 2007-2015 | |
| 53 | Chris Chandler | .4041 | 2023-2037 | |
| 54 | António Hernández | .4037 | 2025-2031 | |
| 55 | José Alberto | .4026 | 2035-2045 | |
| 55 | Mike Martínez | .4026 | 2032-2043 | |
| 57 | Damon Mitchell | .4016 | 2016-2026 | |
| 58 | Valentín Espinoza# | .4009 | 2041-2049 | |
| 59 | William Donnelly | .4000 | 2030-2045 | |
| 59 | Michael Paul | .4000 | 2009-2018 | |
| 59 | Will Rhodes | .4000 | 2032-2036 | |
| 62 | Carlos Sánchez | .3995 | 2030-2048 | |
| 63 | Bill Wilson | .3980 | 2018-2033 | |
| 64 | José Delgado | .3976 | 2030-2044 | |
| 65 | António Cruz# | .3970 | 2039-2048 | |
| 66 | Gordon McMahon | .3969 | 2007-2023 | |
| 67 | Roger Robinson | .3958 | 2015-2023 | |
| 68 | Charlie Guevara | .3953 | 2040-2046 | |
| 68 | Román Guzmán | .3953 | 2015-2017 | |
| 70 | Ronald Carter# | .3938 | 2041-2049 | |
| 71 | Anatolio Uribe# | .3937 | 2046-2049 | |
| 71 | Víctor Hernández# | .3937 | 2039-2049 | |
| 73 | Santiago Márquez | .3926 | 2015-2035 | |
| 74 | Douglas Taylor | .3923 | 2027-2043 | |
| 75 | Francisco García | .3922 | 2007-2020 | |
| 75 | Carlos Suárez# | .3922 | 2042-2049 | |
| 77 | Leopold Wilmetz | .3913 | 2008-2017 | |
| 78 | Júlio Figueroa | .3904 | 2024-2036 | |
| 79 | Víctor Cardenas# | .3902 | 2037-2049 | |
| 79 | Greg O'Day | .3902 | 2010-2022 | |
| 81 | Domingo Flores | .3898 | 2016-2024 | |
| 82 | Ron Young | .3886 | 2031-2043 | |
| 83 | Ken Phillips | .3878 | 2034-2049 | |
| 84 | Paul Broderick# | .3868 | 2042-2049 | |
| 85 | Jonathan O'Rorke | .3867 | 2007-2017 | |
| 86 | Stephen Wilson | .3865 | 2023-2035 | |
| 87 | David Mojica | .3864 | 2007-2011 | |
| 88 | Paco Rosas* | .3855 | 2016-2030 | |
| 89 | Larry Ingram# | .3846 | 2043-2049 | |
| 89 | Aaron Scott | .3846 | 2034-2044 | |
| 91 | Dave Dodd* | .3839 | 2016-2034 | |
| 92 | Augusto Vega | .3837 | 2007-2016 | |
| 93 | Pedro Castro | .3830 | 2032-2045 | |
| 94 | Andrew Alvarado | .3826 | 2024-2036 | |
| 95 | José Álvarez | .3804 | 2013-2020 | |
| 96 | Earl Reed# | .3800 | 2040-2049 | |
| 97 | Jerry Bryan | .3799 | 2018-2027 | |
| 98 | Manuel González | .3797 | 2015-2026 | |
| 99 | Jerry Alexander# | .3790 | 2037-2049 | |
| 99 | Clyde Yarbrough | .3790 | 2022-2036 |
