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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OPS | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Len Jackson# | .9442 | 1982-1991 | |
| 2 | Harold Williams | .9422 | 1963-1974 | |
| 3 | Sterling Patterson | .9154 | 1946-1955 | |
| 4 | Merrill Smith | .9109 | 1975-1989 | |
| 5 | Steve McLaughlin | .8643 | 1954-1965 | |
| 6 | Hanus Huml | .7875 | 1945-1953 | |
| 7 | Jesús Muńóz | .7691 | 1936-1946 | |
| 8 | Sepp Kiemlen | .7277 | 1934-1945 |
