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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Pablo Vegas* | .4530 | 2004 | |
| 2 | Pablo Vegas* | .4424 | 2000 | |
| 3 | Pablo Vegas* | .4392 | 2003 | |
| 4 | Mitchell Young | .4358 | 2002 | |
| 5 | Pablo Vegas* | .4345 | 2006 | |
| 6 | Victor Gonzalez# | .4310 | 2011 | |
| 7 | Juan Ortega# | .4177 | 2015 | |
| 8 | Pablo Vegas* | .4134 | 2005 | |
| 9 | Miles Hayes | .4116 | 2003 | |
| 10 | Joe Robinson# | .4063 | 2025 | |
| 11 | Jeremy Yamakawa | .4051 | 2006 | |
| 12 | Jonathan Ashley | .4042 | 2013 | |
| 13 | Jonathan Ashley | .4009 | 2012 | |
| 14 | Jeremy Yamakawa | .3989 | 2007 | |
| 15 | Jeremy Yamakawa | .3974 | 2010 | |
| 16 | Manuel Rosas# | .3926 | 2024 | |
| 17 | Brett Byrnes | .3911 | 2012 | |
| 18 | Yu-xing Cheng | .3906 | 2008 | |
| 19 | Jeff Coleman# | .3891 | 2017 | |
| 20 | Pat Marchitto# | .3880 | 2023 | |
| 21 | Jeremy Yamakawa | .3870 | 2008 | |
| 21 | Mel Aguilar | .3870 | 2018 | |
| 23 | Pat Marchitto# | .3845 | 2021 | |
| 24 | Freddy Bookout | .3808 | 2008 | |
| 25 | Joe Robinson# | .3786 | 2024 | |
| 26 | Juan Ortega# | .3779 | 2014 | |
| 27 | Yasuro Sugimoto | .3773 | 2011 | |
| 27 | Jonathan Ashley | .3773 | 2015 | |
| 29 | Brett Byrnes | .3766 | 2010 | |
| 30 | Tom Tillotson | .3761 | 2008 | |
| 31 | John Austin# | .3755 | 2025 | |
| 32 | Carlos Lopez | .3752 | 2000 | |
| 33 | Miles Hayes | .3741 | 2005 | |
| 34 | Shane Jenkins | .3732 | 2004 | |
| 35 | Manuel Rosas# | .3729 | 2022 | |
| 36 | Yasuro Sugimoto | .3728 | 2013 | |
| 37 | Emmanuel Haigler | .3721 | 2013 | |
| 38 | Manuel Rosas# | .3720 | 2021 | |
| 39 | Julio Gonzalez | .3719 | 2009 | |
| 40 | Rich Noble | .3709 | 2005 | |
| 41 | John Austin# | .3707 | 2019 | |
| 42 | Blake Benigno# | .3704 | 2023 | |
| 43 | Jalen Armour | .3702 | 2003 | |
| 44 | Aaron Kay | .3699 | 2006 | |
| 45 | Nick Sumney# | .3694 | 2023 | |
| 46 | Casey Schmidt | .3693 | 2005 | |
| 47 | Manuel Rosas# | .3690 | 2023 | |
| 48 | Brett Byrnes | .3682 | 2004 | |
| 48 | Pat Marchitto# | .3682 | 2019 | |
| 50 | John Austin# | .3676 | 2022 | |
| 51 | Melvin Vargas | .3674 | 2007 | |
| 52 | Brett Byrnes | .3671 | 2011 | |
| 53 | Soroku Asari | .3670 | 2010 | |
| 54 | Mitchell Young | .3667 | 2005 | |
| 55 | John Austin# | .3658 | 2021 | |
| 56 | Jonathan Ashley | .3657 | 2016 | |
| 57 | Isaiah Mill# | .3650 | 2023 | |
| 58 | Emmanuel Haigler | .3649 | 2008 | |
| 59 | Emmanuel Haigler | .3646 | 2009 | |
| 60 | Tony Villarreal# | .3644 | 2017 | |
| 61 | Heath Graves# | .3643 | 2024 | |
| 62 | Tsunemi Higaki | .3635 | 2012 | |
| 63 | Jeff Coleman# | .3627 | 2019 | |
| 64 | Travis Collier | .3621 | 2012 | |
| 64 | Juan Ortega# | .3621 | 2016 | |
| 66 | Heath Graves# | .3619 | 2022 | |
| 67 | Manuel Rosas# | .3616 | 2025 | |
| 68 | Pat Marchitto# | .3611 | 2020 | |
| 69 | Cesar Ornelas# | .3606 | 2024 | |
| 70 | Miles Hayes | .3595 | 2004 | |
| 70 | Brett Byrnes | .3595 | 2003 | |
| 72 | Josh Miller | .3587 | 2005 | |
| 72 | Gabriel Perez | .3587 | 2008 | |
| 74 | John Jackson | .3581 | 2004 | |
| 75 | Andrew Baltzley# | .3579 | 2022 | |
| 75 | George Reed | .3579 | 2003 | |
| 77 | Nick Sumney# | .3576 | 2024 | |
| 78 | Juan Ortega# | .3571 | 2019 | |
| 79 | Osvaldo Avila | .3570 | 2014 | |
| 80 | Gary Dineen | .3569 | 2005 | |
| 80 | George Reed | .3569 | 2007 | |
| 82 | Oliver Damon# | .3567 | 2018 | |
| 83 | Fernando Rodriguez | .3566 | 2011 | |
| 83 | John Jackson | .3566 | 2006 | |
| 85 | Jesus Irizarry | .3562 | 2012 | |
| 86 | Miles Hayes | .3561 | 2006 | |
| 87 | Miles Hayes | .3552 | 2007 | |
| 88 | Jimmy Frew# | .3551 | 2023 | |
| 89 | Jonathan Ashley | .3549 | 2014 | |
| 90 | Jalen Armour | .3546 | 2002 | |
| 91 | Frank Hoffman# | .3545 | 2025 | |
| 92 | Soroku Asari | .3543 | 2011 | |
| 92 | Emmanuel Haigler | .3543 | 2007 | |
| 94 | Melvin Vargas | .3530 | 2009 | |
| 95 | Brett Byrnes | .3522 | 2013 | |
| 96 | Miles Hayes | .3519 | 2001 | |
| 97 | Tim Hummel# | .3518 | 2019 | |
| 97 | Emmanuel Haigler | .3518 | 2010 | |
| 99 | Matt Gilfillan | .3516 | 2017 | |
| 100 | Jerry Wilson | .3509 | 2000 |
