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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Ray Baker | .5010 | 2009 | |
| 2 | Guillermo Velasquez | .4638 | 1994 | |
| 3 | José Osón | .4637 | 2015 | |
| 4 | Tom Frye# | .4606 | 2025 | |
| 5 | Brennan Baker | .4583 | 2010 | |
| 6 | Gabe Gross | .4544 | 2005 | |
| 7 | Jon Martínez | .4528 | 2012 | |
| 8 | Carlos Pérez# | .4454 | 2023 | |
| 9 | Jack Cust | .4439 | 2002 | |
| 10 | Errol Calhoun | .4426 | 2017 | |
| 11 | Bryce Harper | .4388 | 2015 | |
| 12 | Bart Cook | .4364 | 2014 | |
| 13 | Trot Nixon | .4362 | 1997 | |
| 14 | Robb Quinlan | .4357 | 2003 | |
| 14 | Miguel Gamboa# | .4357 | 2021 | |
| 16 | Richard Hensley | .4353 | 2011 | |
| 17 | Giancarlo Stanton | .4327 | 2014 | |
| 18 | Nick Johnson | .4315 | 2012 | |
| 19 | Darren Crabtree | .4312 | 2018 | |
| 20 | Joe Haynes# | .4310 | 2030 | |
| 21 | Brennan Baker | .4302 | 2011 | |
| 22 | Kumanosuke Nakagawa# | .4292 | 2027 | |
| 23 | Langgeng Pane | .4286 | 2018 | |
| 24 | Jeff Miller# | .4283 | 2031 | |
| 25 | Enrique Cruz | .4277 | 2010 | |
| 26 | Jonathan Coleman# | .4273 | 2030 | |
| 27 | Carlos Hernández# | .4258 | 2022 | |
| 28 | Morgan Burkhart | .4251 | 2001 | |
| 29 | Ben Holley | .4239 | 2012 | |
| 30 | Walt Robinson | .4232 | 2025 | |
| 31 | Scott Jackson | .4231 | 2020 | |
| 32 | Mario Álvarez# | .4224 | 2027 | |
| 33 | Hee-Seop Choi | .4222 | 2011 | |
| 34 | César Morín# | .4217 | 2029 | |
| 34 | Rubén Gonzáles | .4217 | 2005 | |
| 36 | Ronald Benjamin | .4214 | 2017 | |
| 37 | Héctor Barilla | .4210 | 2009 | |
| 38 | Steve R Dunn | .4203 | 2000 | |
| 39 | Julius Johnston | .4201 | 2018 | |
| 40 | Ken Jackson | .4199 | 2020 | |
| 41 | Ken Jackson | .4187 | 2018 | |
| 42 | Roberto Petagine | .4183 | 1999 | |
| 43 | Edmond George | .4174 | 2014 | |
| 44 | Max Dean | .4165 | 2011 | |
| 44 | Ed Cannon | .4165 | 2012 | |
| 46 | Gary Matthews Jr | .4161 | 1999 | |
| 46 | Mark Sweeney | .4161 | 1996 | |
| 48 | Doug Mientkiewicz | .4159 | 1998 | |
| 49 | Del Tollberg | .4156 | 2013 | |
| 50 | Nathan Hayes | .4151 | 2017 | |
| 51 | Ed Harris | .4150 | 2012 | |
| 52 | Esteban Gallardo | .4149 | 2011 | |
| 53 | Chase Workman | .4132 | 2014 | |
| 53 | Vincente Álvarez | .4132 | 2013 | |
| 55 | Edmond George | .4125 | 2015 | |
| 56 | Eric Green | .4124 | 2008 | |
| 56 | Chris Davis | .4124 | 2011 | |
| 58 | Jesse Levis | .4123 | 1999 | |
| 59 | Barry Adams | .4122 | 2025 | |
| 60 | Silvério Montarroio# | .4120 | 2030 | |
| 61 | Augusto De La Cruz | .4117 | 2018 | |
| 61 | Hee-Seop Choi | .4117 | 2012 | |
| 63 | Junior Spivey | .4116 | 2010 | |
| 64 | Johnathan Gibbs | .4115 | 2016 | |
| 65 | Paul Wagner# | .4112 | 2026 | |
| 66 | Jim Murphy | .4111 | 2013 | |
| 67 | Armando Álvarez# | .4109 | 2025 | |
| 68 | John Terry | .4108 | 2015 | |
| 69 | Roger McPherson# | .4106 | 2031 | |
| 70 | Ben Trent | .4104 | 2014 | |
| 71 | Miguel Venet | .4101 | 2013 | |
| 71 | Roberto Álvarez | .4101 | 2010 | |
| 73 | Darren Crabtree | .4098 | 2017 | |
| 74 | Mario González# | .4096 | 2028 | |
| 75 | Manuel Márquez# | .4095 | 2025 | |
| 76 | Jorge Castillo# | .4092 | 2029 | |
| 76 | Noel England# | .4092 | 2025 | |
| 78 | Ryan Jackson | .4090 | 2014 | |
| 79 | Javier López | .4089 | 2012 | |
| 80 | Pat Lennon | .4088 | 1995 | |
| 81 | Vincente Álvarez | .4081 | 2012 | |
| 82 | Pete Alonso# | .4080 | 2021 | |
| 83 | Bryan Rowe# | .4079 | 2025 | |
| 84 | Mark Kotsay | .4077 | 2006 | |
| 85 | Russ Adams | .4070 | 2010 | |
| 86 | Ryan Radmanovich | .4069 | 1998 | |
| 87 | Michael Little | .4067 | 2013 | |
| 87 | Stephen Vaughn | .4067 | 2012 | |
| 89 | Kelvin Banks# | .4065 | 2030 | |
| 90 | Cristián Cuevas | .4064 | 2012 | |
| 91 | Ben Davis | .4063 | 2010 | |
| 91 | Josh Wilson | .4063 | 2011 | |
| 93 | Jordan Olsen | .4062 | 2007 | |
| 94 | Del Tollberg | .4057 | 2012 | |
| 95 | Arthur Sanders | .4056 | 2012 | |
| 95 | Roberto Zúñiga | .4056 | 2012 | |
| 97 | Todd Clark | .4055 | 2018 | |
| 98 | Tino Martinez | .4052 | 1999 | |
| 99 | Ernest Watkins | .4051 | 2005 | |
| 100 | Derrek Lee | .4050 | 2007 |
