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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Martin Jordan | .6544 | 1962-1965 | |
| 2 | Mathias Albertoni* | .6227 | 1947-1950 | |
| 3 | Austin Johnson | .5941 | 1950-1953 | |
| 4 | Francisco Hidalgo | .5217 | 1927-1930 | |
| 5 | Joe Pérez# | .5062 | 1975-1978 | |
| 6 | Félix Mansanarez | .4950 | 1938-1941 | |
| 7 | Johnny Rodríguez | .4914 | 1937-1940 | |
| 8 | Albert Martínez | .4879 | 1969-1973 | |
| 9 | Stan O'Rourke | .4847 | 1937-1940 | |
| 10 | Octávio Ortíz | .4719 | 1951-1954 | |
| 11 | Robert Cox | .4717 | 1933-1936 | |
| 12 | Ricardo Morales | .4654 | 1963-1966 | |
| 13 | Clayton Leonard | .4612 | 1934-1937 | |
| 14 | Millard Montgomery | .4578 | 1965-1968 | |
| 15 | Luis Esparza | .4538 | 1937-1940 | |
| 16 | Curt Brown | .4482 | 0-0 | |
| 17 | León Osorio | .4271 | 1927-1931 | |
| 18 | Elton Kenney | .4032 | 1934-1937 | |
| 19 | Artie Oliveira | .4003 | 1945-1948 | |
| 20 | Derek Wood | .3540 | 1958-1961 | |
| 21 | Greg Butler# | .3476 | 1980-1983 | |
| 22 | John Eckard | .3396 | 1970-1974 |
