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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Toru Nakao | .5318 | 2025 | |
| 2 | Ray Long | .4613 | 2011 | |
| 3 | Toru Nakao | .4558 | 2024 | |
| 4 | Gabe Moran | .4554 | 2021 | |
| 5 | Bob McNeese | .4459 | 2017 | |
| 6 | Gino Schlepp | .4421 | 2023 | |
| 7 | Justin Liotta | .4399 | 2030 | |
| 8 | Rich Mulholland | .4359 | 2018 | |
| 9 | Tim Johns | .4336 | 2023 | |
| 10 | Alex Arellano | .4319 | 2006 | |
| 11 | Michael Jackson | .4274 | 2013 | |
| 12 | Luis Gomez | .4264 | 2006 | |
| 13 | Alex Jorge | .4245 | 2023 | |
| 14 | Ricky Gonzalez | .4238 | 2024 | |
| 15 | Randy Gaber | .4204 | 2021 | |
| 16 | Keith Kaplan | .4186 | 2023 | |
| 17 | Jim Lawrence | .4177 | 2016 | |
| 18 | Guillermo Lombera | .4164 | 2006 | |
| 19 | Javier Barrios | .4158 | 2020 | |
| 20 | Danny Urcino | .4153 | 2008 | |
| 21 | Caleb Vogt | .4150 | 2021 | |
| 22 | Cesar Ceniceros | .4135 | 2026 | |
| 23 | Ryan Fewell | .4097 | 2007 | |
| 24 | Eli Catillo | .4095 | 2022 | |
| 25 | Daniel Regalado | .4094 | 2011 | |
| 26 | Israel Llamas | .4086 | 2016 | |
| 27 | Willis Jennings# | .4074 | 2045 | |
| 28 | R.J. Carter | .4072 | 2027 | |
| 29 | T.J. Burns | .4071 | 2023 | |
| 30 | Ryan Fiedler | .4060 | 2026 | |
| 31 | Virgilio Enciso | .4055 | 2014 | |
| 32 | Sam Logue | .4054 | 2004 | |
| 33 | Carlos Harnandez | .4047 | 2019 | |
| 34 | Alex Castillio | .4044 | 2018 | |
| 35 | Jack Bright# | .4041 | 2046 | |
| 36 | Cory Dobis | .4036 | 2006 | |
| 37 | Ken Horowitz | .4035 | 2027 | |
| 38 | Cameron Shearer | .4034 | 2027 | |
| 39 | Ha-joon Won | .4027 | 2013 | |
| 40 | Jayden Thompson | .4021 | 2027 | |
| 41 | Ramón Cadena | .4018 | 2032 | |
| 42 | Chris Bridges | .4013 | 2021 | |
| 43 | William Counsell | .4007 | 2017 | |
| 44 | Albert Cardona | .4000 | 2011 | |
| 45 | Joe Bateman | .3987 | 2026 | |
| 46 | Caleb Phillips# | .3984 | 2046 | |
| 47 | Ramiro Arriaga | .3982 | 2022 | |
| 48 | Travis Walston | .3981 | 2023 | |
| 49 | Kyle Dillion | .3979 | 2026 | |
| 50 | Tim Wade | .3972 | 2014 | |
| 51 | Alex Arias | .3969 | 2013 | |
| 52 | Melvin Carranza | .3948 | 2012 | |
| 53 | Lúcio Cabrera | .3941 | 2031 | |
| 54 | Edwin Matheson | .3939 | 2021 | |
| 55 | Wally Lowder | .3934 | 2022 | |
| 55 | Jesus Gallegos | .3934 | 2017 | |
| 57 | Kelly Schick | .3929 | 2032 | |
| 58 | Craig Garcia | .3927 | 2015 | |
| 59 | Zachary Tomczak | .3921 | 2025 | |
| 60 | Adam Frazier | .3919 | 2007 | |
| 61 | Idel Franco | .3916 | 2030 | |
| 62 | Zach Harris# | .3913 | 2049 | |
| 63 | Rusty Reffitt# | .3907 | 2040 | |
| 64 | Harper Cunningham | .3905 | 2044 | |
| 65 | Ignacio Barros | .3900 | 2013 | |
| 66 | Kurt McMillan | .3896 | 2030 | |
| 67 | Tony Estrada | .3895 | 2006 | |
| 68 | Justin Rowe | .3893 | 2017 | |
| 69 | Dave Uberti | .3887 | 2022 | |
| 69 | Quenton Wilton# | .3887 | 2048 | |
| 71 | Sebastian Whitfield | .3880 | 2031 | |
| 72 | Aimar Arcia | .3877 | 2030 | |
| 73 | Bobby Cura | .3870 | 2013 | |
| 74 | Chris Stem | .3862 | 2022 | |
| 75 | Terry Puente | .3861 | 2041 | |
| 75 | Matt Hale | .3861 | 2025 | |
| 77 | Ezequiel Guevara | .3858 | 2025 | |
| 78 | Alex Quintana | .3855 | 2022 | |
| 79 | Nick Whitacre | .3852 | 2014 | |
| 80 | Sean Barnes | .3850 | 2015 | |
| 81 | Nick Kuchta | .3849 | 2024 | |
| 82 | John Bowles | .3846 | 2014 | |
| 83 | Will Lubbers | .3840 | 2016 | |
| 84 | Elijah Reaves | .3838 | 2022 | |
| 85 | Kurt Jackowski | .3833 | 2025 | |
| 85 | Maddox D'Arcy | .3833 | 2030 | |
| 87 | Bobby Behrens | .3831 | 2022 | |
| 88 | Mike Colton | .3828 | 2026 | |
| 89 | Sergio de Leon | .3823 | 2014 | |
| 90 | Trey Junaidi | .3821 | 2036 | |
| 91 | Andy Aguirre | .3819 | 2013 | |
| 92 | Joe Follick | .3818 | 2011 | |
| 93 | Alex Vazquez | .3817 | 2027 | |
| 94 | Brandon Han | .3807 | 2032 | |
| 95 | John Lindell | .3803 | 2021 | |
| 95 | Manny Flores | .3803 | 2017 | |
| 97 | Joel Seipel | .3800 | 2016 | |
| 98 | Chris Onder | .3797 | 2026 | |
| 99 | Travis Russo | .3793 | 2016 | |
| 99 | Chris Malakowsky | .3793 | 2016 |
