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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Mickey Cochrane# | .4100 | 2016 | |
| 2 | Nino Manfredi# | .3912 | 2016 | |
| 3 | Nino Manfredi# | .3779 | 2015 | |
| 4 | Joe Mauer# | .3638 | 2015 | |
| 5 | Jason Kendall# | .3526 | 2015 | |
| 6 | Joe Mauer# | .3490 | 2016 | |
| 7 | Ivan Rodriguez# | .3402 | 2014 | |
| 8 | Ivan Rodriguez# | .3385 | 2015 | |
| 9 | Gary Carter# | .3294 | 2015 | |
| 10 | Roger Bresnahan# | .3259 | 2014 | |
| 11 | Darrell Porter# | .3193 | 2016 | |
| 12 | Darrell Porter# | .3165 | 2014 | |
| 13 | Gary Carter# | .3135 | 2014 | |
| 14 | Roger Bresnahan# | .3120 | 2016 | |
| 15 | Ivan Rodriguez# | .2966 | 2016 | |
| 16 | Joe Mauer# | .2899 | 2014 | |
| 17 | Gary Carter# | .2781 | 2016 |
