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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Mario Gonzáles | .4750 | 1956-1968 | |
| 2 | Teferi Amar* | .4707 | 1970-1980 | |
| 3 | Manuel Ramírez* | .4685 | 1948-1966 | |
| 4 | John Howard* | .4505 | 1936-1943 | |
| 5 | Owen Harris | .4262 | 1949-1962 | |
| 6 | Carl Summerhayes | .4219 | 1919-1933 | |
| 7 | Tom Smith | .4200 | 1960-1973 | |
| 8 | Teegan Grimmit | .4115 | 1938-1949 | |
| 9 | Rubén Rivera | .4099 | 1925-1936 | |
| 10 | Henry Chandler | .4098 | 1935-1941 | |
| 11 | Steve Ford* | .4077 | 1959-1971 | |
| 12 | Miguel Galván | .4060 | 1968-1977 | |
| 13 | Aurelio Viera | .4013 | 1956-1970 | |
| 14 | Javier Francisco | .3998 | 1943-1953 | |
| 15 | José Martínez | .3958 | 1963-1977 | |
| 16 | Chris Simmons | .3928 | 1980-1988 | |
| 17 | Rob Cornett | .3904 | 1923-1931 | |
| 18 | Norberto Torres# | .3867 | 1982-1991 | |
| 19 | Devin Adams | .3862 | 1915-1923 | |
| 20 | Alfredo Ortíz | .3793 | 1973-1986 | |
| 21 | Chris Piquet | .3769 | 1962-1972 | |
| 22 | Siu-chung Hung | .3754 | 1933-1939 | |
| 23 | Javier Sandoval | .3742 | 1914-1929 | |
| 24 | Teklu Ekundayo | .3725 | 1968-1983 | |
| 25 | Tim Murdock | .3653 | 1935-1949 | |
| 26 | Ed Bowie | .3650 | 1922-1929 | |
| 27 | Randall Mack# | .3649 | 1982-1991 | |
| 28 | Salvador Villalove | .3614 | 1950-1959 | |
| 29 | Vinayak Shamsher | .3595 | 1975-1987 | |
| 30 | Dave Johnson# | .3546 | 1979-1991 | |
| 31 | Brandon Williamson | .3529 | 1971-1982 | |
| 32 | Francisco Maldonado | .3471 | 1934-1943 | |
| 33 | Hadad Bahir# | .3463 | 1975-1991 | |
| 34 | Ernesto Méndez | .3437 | 1978-1989 | |
| 35 | Ayuba Njama# | .3429 | 1973-1991 | |
| 36 | Jeff Picot | .3368 | 1980-1990 | |
| 37 | Francisco Chávez# | .3349 | 1978-1988 | |
| 38 | Iván Forseca | .3342 | 1942-1954 | |
| 39 | Edgar Luna | .2911 | 1970-1980 | |
| 40 | Herbert Evans | .2831 | 1913-1932 |
