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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Everardo Gremades* | .4429 | 1979-1999 | |
| 2 | Carmem Chamissa* | .4013 | 1989-2001 | |
| 3 | Bobby Tiscareno | .4006 | 2002-2015 | |
| 4 | David Gamboa | .3978 | 1999-2018 | |
| 5 | Lucca Memmoli | .3932 | 1994-2009 | |
| 6 | Eddie O'Fallon | .3922 | 1978-1990 | |
| 7 | Rex Morgan* | .3910 | 1991-2006 | |
| 8 | Turell Morris* | .3867 | 2028-2040 | |
| 9 | Dez Swanson# | .3858 | 2048-2060 | |
| 10 | Robby Shannon | .3821 | 1984-2000 | |
| 11 | Terumoto Chiba | .3819 | 2006-2014 | |
| 12 | Harry Keppel* | .3817 | 1978-1998 | |
| 13 | Parker Lee# | .3812 | 2051-2060 | |
| 14 | Alex Otero | .3786 | 2007-2022 | |
| 15 | Joe Sierra | .3778 | 1978-1989 | |
| 16 | Dominique Graham | .3777 | 2040-2058 | |
| 17 | Elmer Caceres* | .3752 | 2035-2052 | |
| 18 | Joe Rojas* | .3746 | 1989-2004 | |
| 19 | Manny Quezada | .3737 | 2029-2041 | |
| 20 | Jordan Camejo | .3721 | 2003-2015 | |
| 21 | Diego Flores | .3715 | 2003-2019 | |
| 22 | Don O'Finegan | .3712 | 1988-1998 | |
| 23 | J.D. Rice* | .3709 | 2034-2051 | |
| 24 | R.J. Kapper* | .3695 | 2029-2043 | |
| 25 | Ahmed Salter | .3689 | 2034-2047 | |
| 26 | Johnny Swope* | .3684 | 2024-2044 | |
| 27 | Andy Dillon# | .3682 | 2053-2060 | |
| 28 | Joe Seagarra | .3676 | 1981-1997 | |
| 29 | Dani Álvarez* | .3675 | 1983-2001 | |
| 29 | Bruno Damours | .3675 | 2023-2036 | |
| 29 | Dalton Hamilton# | .3675 | 2048-2060 | |
| 32 | Dani Muñóz | .3666 | 1990-2004 | |
| 33 | Andy Ulloa | .3645 | 2022-2027 | |
| 34 | Jared Kirby* | .3638 | 1978-1996 | |
| 35 | Raúl De Jesús | .3637 | 1988-2001 | |
| 36 | Don Hudson | .3635 | 1989-2003 | |
| 37 | D.J. Osburn | .3633 | 2035-2048 | |
| 37 | Cory Petit# | .3633 | 2052-2060 | |
| 39 | Jaxson Neal | .3632 | 2041-2056 | |
| 40 | Antonio Romo | .3626 | 1983-1998 | |
| 41 | Joy-shan Guo | .3622 | 2025-2041 | |
| 42 | Ron O'Fallon | .3615 | 1986-1998 | |
| 43 | Gene Murphy | .3599 | 1984-1991 | |
| 43 | Will Harper# | .3599 | 2044-2059 | |
| 45 | Sayon Castillo# | .3592 | 2047-2059 | |
| 46 | Hector Feliciano* | .3588 | 2002-2019 | |
| 47 | Toby Rochester | .3576 | 1978-1986 | |
| 48 | Ed Mossberg | .3575 | 2027-2038 | |
| 49 | Brendon Gleason | .3574 | 2001-2014 | |
| 50 | James Munsie# | .3571 | 2045-2060 | |
| 51 | Geoff Dail | .3568 | 2022-2040 | |
| 52 | Pat Nunes* | .3565 | 2032-2054 | |
| 53 | Al Flanagan# | .3557 | 2046-2059 | |
| 54 | Shawn Ray | .3556 | 1991-1999 | |
| 55 | Antonio Banuelos | .3552 | 2009-2025 | |
| 56 | Burgess Nalivkin# | .3548 | 2046-2060 | |
| 57 | Xavier Landress | .3543 | 2022-2036 | |
| 58 | Herb MacCutcheon | .3533 | 1980-1988 | |
| 59 | Jaime Middaugh | .3530 | 2027-2033 | |
| 60 | D.J. Gosser | .3527 | 2016-2027 | |
| 61 | Robby Caddell | .3513 | 2027-2037 | |
| 62 | Dave Wescott | .3511 | 2016-2024 | |
| 63 | Pat Washington | .3506 | 1984-1994 | |
| 64 | Adrian Gramling# | .3502 | 2041-2058 | |
| 65 | Tom Gross | .3498 | 2034-2041 | |
| 66 | Julian Irwin# | .3496 | 2046-2059 | |
| 67 | Masao Nara | .3492 | 2008-2023 | |
| 68 | Kikuzo Ishikawa | .3490 | 2015-2027 | |
| 68 | Kenichi Sato | .3490 | 1984-1997 | |
| 70 | Frank Hamlet | .3488 | 1979-1990 | |
| 71 | Willie Rosales | .3484 | 2006-2018 | |
| 72 | Tom Miller | .3483 | 2031-2039 | |
| 73 | Erik Colgate | .3477 | 2018-2023 | |
| 74 | David Rizer | .3473 | 2020-2032 | |
| 75 | Pat Branum | .3471 | 2029-2043 | |
| 76 | Stuart Beale# | .3467 | 2044-2058 | |
| 77 | Dave Slack | .3465 | 2009-2020 | |
| 77 | Fred Frederick* | .3465 | 2018-2027 | |
| 79 | Norm Seltzer | .3457 | 1987-1994 | |
| 80 | Coleman Conaway | .3456 | 2036-2049 | |
| 81 | Blake Hartman | .3455 | 2038-2046 | |
| 82 | Art Yeandle | .3449 | 1992-2007 | |
| 83 | Nari Garin | .3447 | 1998-2009 | |
| 84 | Shane Solum | .3440 | 2004-2012 | |
| 85 | Seth Donna | .3438 | 2044-2053 | |
| 86 | Brad Pendolino# | .3429 | 2052-2060 | |
| 87 | Dylan Owens* | .3424 | 2017-2039 | |
| 88 | Curt Knight | .3420 | 1989-2003 | |
| 89 | James Mitchell# | .3417 | 2044-2059 | |
| 90 | Beau Pruett# | .3415 | 2051-2060 | |
| 91 | Frank Zamora | .3412 | 2002-2016 | |
| 92 | C.J. Turnbow | .3410 | 2018-2029 | |
| 93 | Colin Bailey | .3407 | 2030-2042 | |
| 94 | Jayson Buenaventura | .3396 | 2036-2047 | |
| 95 | Dave Hodge | .3394 | 2025-2035 | |
| 96 | Jesse Baker# | .3392 | 2049-2060 | |
| 97 | Mitch Marcinkowski# | .3390 | 2049-2059 | |
| 98 | Roberto Goto | .3384 | 1999-2016 | |
| 99 | Landon Tolleson | .3374 | 2046-2055 | |
| 100 | Alexis Camilo | .3373 | 1998-2010 |
