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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | David Henderson | .357 | 2016-2025 | |
| 2 | Barry Flauker# | .322 | 2036-2042 | |
| 3 | Gregg Wagner | .318 | 2019-2028 | |
| 4 | Jon Osterman# | .296 | 2028-2042 | |
| 5 | Nobuo Yamashita | .291 | 2025-2034 | |
| 6 | Juan Caro | .286 | 2029-2041 |
