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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Mark Zagunis | .4676 | 2020 | |
| 2 | Rafael Ortega# | .4380 | 2019 | |
| 3 | Jorge Barrosa# | .4329 | 2025 | |
| 4 | Alan Roden# | .4283 | 2024 | |
| 5 | Lourdes Gurriel Jr.# | .4278 | 2018 | |
| 6 | Juan Duran | .4276 | 2018 | |
| 7 | Chris Pieters | .4226 | 2021 | |
| 8 | Tony Kemp | .4159 | 2018 | |
| 9 | Jesse Winker# | .4152 | 2015 | |
| 10 | Yusniel Diaz# | .4149 | 2025 | |
| 11 | Carlos Cortes# | .4143 | 2021 | |
| 12 | Matt Juengel | .4140 | 2018 | |
| 13 | Roman Collins | .4103 | 2020 | |
| 14 | Drew Heid | .4093 | 2015 | |
| 15 | Yusniel Diaz# | .4083 | 2024 | |
| 16 | Chris Roller# | .4071 | 2024 | |
| 17 | Donald Lutz | .4036 | 2014 | |
| 18 | Leody Taveras# | .4033 | 2023 | |
| 19 | Mark Payton# | .4017 | 2017 | |
| 20 | Mike Papi# | .3959 | 2019 | |
| 21 | Trayvon Robinson | .3938 | 2013 | |
| 22 | Kellen Strahm# | .3911 | 2025 | |
| 23 | Demi Orimoloye# | .3860 | 2020 | |
| 24 | Roman Collins | .3859 | 2019 | |
| 25 | Jason Coats | .3829 | 2016 | |
| 26 | Drew Heid | .3814 | 2017 | |
| 27 | Donald Lutz | .3806 | 2013 | |
| 28 | Rhylan Thomas# | .3778 | 2024 | |
| 29 | Kyle Jensen | .3759 | 2016 | |
| 30 | Jake Mangum# | .3753 | 2022 | |
| 31 | Matt Murton | .3710 | 2017 | |
| 32 | Anthony Garcia# | .3702 | 2025 | |
| 33 | Yusniel Diaz# | .3679 | 2023 | |
| 34 | Johnny Field | .3626 | 2020 | |
| 35 | Conner Capel# | .3613 | 2022 | |
| 36 | Drew Heid | .3571 | 2016 | |
| 37 | Anthony Garcia# | .3555 | 2022 | |
| 38 | Michael Guldberg# | .3521 | 2023 | |
| 39 | Brewer Hicklen# | .3488 | 2022 | |
| 40 | Bryson Smith | .3416 | 2015 | |
| 41 | Jake Peter | .3415 | 2017 | |
| 42 | Allan de San Miguel | .3318 | 2017 | |
| 43 | Forrestt Allday | .2905 | 2014 |
