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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Frank Thomas# | .409 | 1990-1998 | |
| 2 | Edgar Martinez# | .380 | 1987-1998 | |
| 3 | Mike Hargrove | .378 | 1976-1988 | |
| 4 | John Olerud# | .371 | 1989-1998 | |
| 5 | Mark McGwire# | .365 | 1986-1998 | |
| 6 | Keith Hernandez | .364 | 1976-1993 | |
| 7 | Will Clark# | .360 | 1986-1998 | |
| 8 | Mark Grace# | .359 | 1988-1998 | |
| 9 | John Mayberry | .357 | 1976-1986 | |
| 10 | Hiromitsu Ochiai | .353 | 1982-1994 | |
| 11 | John Kruk# | .351 | 1986-1997 | |
| 12 | Jeff Bagwell# | .349 | 1991-1998 | |
| 13 | Alvin Davis | .348 | 1984-1995 | |
| 14 | Ken Phelps | .347 | 1980-1989 | |
| 15 | Carlos Delgado# | .346 | 1993-1998 | |
| 16 | Danny Tartabull# | .342 | 1984-1998 | |
| 17 | Fred McGriff# | .341 | 1986-1998 | |
| 18 | Bob Watson | .339 | 1976-1986 | |
| 19 | Rafael Palmeiro# | .338 | 1986-1998 | |
| 19 | Eddie Murray | .338 | 1977-1992 | |
| 21 | Mike Ivie | .335 | 1976-1990 | |
| 21 | Don Mattingly# | .335 | 1982-1998 | |
| 23 | Gary Matthews | .334 | 1976-1992 | |
| 24 | Jason Thompson | .333 | 1977-1986 | |
| 25 | Kent Hrbek# | .331 | 1981-1997 | |
| 25 | Howard Johnson# | .331 | 1982-1998 | |
| 27 | Glenn Davis# | .329 | 1984-1998 | |
| 28 | Mike Young | .327 | 1982-1992 | |
| 29 | Hal Morris# | .325 | 1989-1998 | |
| 30 | Willie Aikens | .324 | 1977-1989 | |
| 31 | Ivan Calderon# | .323 | 1984-1998 | |
| 32 | Wally Joyner | .322 | 1986-1992 | |
| 33 | Bob Horner* | .321 | 1978-1993 | |
| 34 | Steve Sax | .319 | 1981-1992 | |
| 35 | Pete O'Brien | .318 | 1982-1992 | |
| 36 | Willie Upshaw | .315 | 1979-1990 | |
| 37 | Craig Shipley# | .314 | 1986-1998 | |
| 37 | Cecil Cooper | .314 | 1976-1992 | |
| 39 | Terry Francona | .311 | 1981-1996 | |
| 40 | Joe Charboneau | .309 | 1980-1991 | |
| 40 | Mike Marshall | .309 | 1981-1994 | |
| 42 | Steve Garvey | .308 | 1976-1989 | |
| 43 | Larry Sheets | .304 | 1984-1994 | |
| 44 | Tino Martinez# | .300 | 1991-1997 | |
| 44 | Chris Chambliss | .300 | 1976-1986 | |
| 44 | Cecil Fielder# | .300 | 1985-1997 | |
| 47 | Kevin McReynolds | .299 | 1983-1996 | |
| 48 | Andres Galarraga# | .294 | 1986-1997 | |
| 49 | Kevin Reimer | .286 | 1989-1996 | |
| 50 | Dave Kingman | .283 | 1976-1987 | |
| 51 | Lee Stevens# | .278 | 1991-1997 |
