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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Nicholas Littmann# | .4196 | 1953-1954 | |
| 2 | Paul Morin# | .4089 | 1954-1957 | |
| 3 | Randall Quero# | .4052 | 1956-1957 | |
| 4 | Jesus Gelacio# | .3820 | 1952-1958 | |
| 5 | Billy Connell# | .3635 | 1952-1955 | |
| 6 | Ji-man Kong# | .3625 | 1956-1959 | |
| 7 | Willie Martinez# | .3585 | 1953-1957 | |
| 8 | Bob Foster# | .3549 | 1953-1956 | |
| 9 | Serge Poulet# | .3519 | 1957-1959 | |
| 10 | Ryusuke Sugihara# | .3516 | 1952-1957 |
