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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Jon Maas# | .4825 | 1956 | |
| 2 | Mike Ross# | .4362 | 1953 | |
| 3 | Robby Fritz# | .4206 | 1955 | |
| 4 | Jon Bertelson# | .4200 | 1955 | |
| 5 | Maxime Capriotti# | .4157 | 1956 | |
| 6 | Jelle Hofste# | .4134 | 1958 | |
| 7 | Henri Thomas | .4111 | 1952 | |
| 8 | Kun-woo Kang# | .4037 | 1956 | |
| 9 | Lewis Bowers# | .4023 | 1954 | |
| 10 | Maxime Capriotti# | .4018 | 1955 | |
| 11 | Robby Fritz# | .3801 | 1956 | |
| 12 | Nate Marmolejo# | .3794 | 1953 | |
| 13 | Uinsin Goff# | .3791 | 1958 | |
| 14 | Alwin Ruijten# | .3684 | 1958 | |
| 15 | Armando Llanes | .3605 | 1952 | |
| 16 | Nate Marmolejo# | .3576 | 1952 | |
| 17 | Lawson Connor# | .3574 | 1952 | |
| 18 | Larry Gabriele# | .3571 | 1958 | |
| 19 | Hector Molina# | .3550 | 1954 | |
| 20 | Danny Raymundo# | .3454 | 1955 | |
| 21 | Tomofumi Kino# | .3345 | 1954 | |
| 22 | Danny Raymundo# | .3183 | 1956 | |
| 23 | Hughie Jones# | .3150 | 1952 | |
| 24 | Maurice Château# | .2884 | 1952 | |
| 25 | Josh Henley# | .2852 | 1952 |
