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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Bryan Cook# | .3898 | 1952-1959 | |
| 2 | Jon Olson# | .3439 | 1952-1959 | |
| 3 | Octavio Muro# | .3250 | 1952-1959 | |
| 4 | Anthony Brunt# | .3238 | 1952-1959 | |
| 5 | Katsumi Aono# | .3157 | 1956-1959 | |
| 6 | Caesar Friis-Knutzen# | .3133 | 1952-1958 | |
| 7 | Jordan Mejia# | .3089 | 1952-1958 | |
| 8 | Gunter Weber# | .3000 | 1953-1956 | |
| 9 | Bob Ramos# | .2974 | 1954-1959 | |
| 10 | Pascal Boccanera# | .2939 | 1952-1959 | |
| 11 | Giovannino Bragantini# | .2897 | 1955-1959 | |
| 12 | Matt MacGillivray# | .2888 | 1952-1959 |
