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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Lee McClendon | .3625 | 1988-1994 | |
| 2 | Raúl Otero | .3623 | 1960-1974 | |
| 3 | Lou Rosário | .3411 | 1996-2004 | |
| 4 | Andrew Hardy | .3110 | 1959-1973 | |
| 5 | Peter Watson# | .3093 | 2005-2014 | |
| 6 | J.R. Hale# | .2998 | 2006-2014 | |
| 7 | Manuel Valadez# | .2982 | 2007-2014 | |
| 8 | Bartolo Ortega# | .2964 | 2006-2014 | |
| 9 | José Padilla# | .2708 | 2005-2013 |
