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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Jim Bottomley# | .4188 | 1991-2000 | |
| 2 | Lu Blue# | .4088 | 1990-2000 | |
| 3 | Ken Singleton# | .3957 | 1984-1999 | |
| 4 | Tommy Medica# | .3813 | 1984-2000 | |
| 5 | Erubiel Durazo# | .3785 | 1990-2000 | |
| 6 | Hal Trosky# | .3768 | 1996-2000 | |
| 7 | José Abreu | .3694 | 1987-2000 | |
| 8 | Boze Berger | .3630 | 1982-1997 | |
| 9 | Jake Cronenworth | .3621 | 1981-1993 | |
| 10 | Tadahito Iguchi# | .3598 | 1992-1999 | |
| 11 | Bill Madlock | .3581 | 1982-1997 | |
| 12 | Calvin Pickering | .3565 | 1980-1992 | |
| 13 | Kolten Wong | .3559 | 1981-1991 | |
| 14 | Alex Bregman | .3499 | 1980-1994 | |
| 15 | Miguel Cabrera | .3486 | 1980-1987 | |
| 16 | Will Clark | .3446 | 1984-1997 | |
| 17 | Rafael Palmeiro# | .3425 | 1986-2000 | |
| 18 | Jack Bolling | .3402 | 1985-1997 | |
| 19 | Ray Boone | .3397 | 1982-1995 | |
| 20 | Mark Reynolds | .3378 | 1990-1997 | |
| 21 | Dansby Swanson | .3335 | 1980-1995 | |
| 22 | Aubrey Huff | .3199 | 1980-1987 | |
| 23 | Eric Karros | .3143 | 1980-1990 | |
| 24 | George Canale | .3125 | 1980-1990 |
