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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Mauro Cardona# | .6256 | 1973-1991 | |
| 2 | Paul Jarl* | .5436 | 1915-1931 | |
| 3 | Pepe Fuentes* | .4789 | 1922-1941 | |
| 4 | Benjamin Riefenstahl | .4473 | 1938-1946 | |
| 5 | Esteban Torres | .4397 | 1916-1931 | |
| 6 | Mike Davis | .4388 | 1912-1924 | |
| 7 | Eiske Jiménez | .4343 | 1972-1987 | |
| 8 | Deniska Darchiashvili# | .4296 | 1971-1991 | |
| 9 | César Rivera | .4276 | 1930-1941 | |
| 10 | Lancaster Seams | .4200 | 1958-1974 | |
| 11 | José Montero | .4111 | 1963-1970 | |
| 12 | Kauto Talus | .4070 | 1964-1980 | |
| 13 | Jeffrey Thomas | .4028 | 1949-1959 | |
| 14 | Russ Pederson | .4024 | 1930-1938 | |
| 15 | Michael Underwood | .3904 | 1933-1940 | |
| 16 | Helmut Hoellwarth# | .3883 | 1977-1991 | |
| 17 | Ed Stewart | .3817 | 1924-1941 | |
| 18 | Pedro Torres | .3812 | 1972-1983 | |
| 19 | Darryl Wolf | .3811 | 1975-1984 | |
| 20 | Ramiro Navarro | .3723 | 1913-1929 | |
| 21 | John Giles | .3666 | 1962-1971 | |
| 22 | Francisco Soto | .3631 | 1968-1982 | |
| 23 | Andrés Nava | .3615 | 1959-1974 | |
| 24 | Gustaf Egberts | .3612 | 1970-1980 | |
| 25 | Freddy Reyes | .3585 | 1911-1917 | |
| 26 | Rafael López# | .3543 | 1983-1990 | |
| 27 | Jesús Díaz# | .3542 | 1983-1991 | |
| 28 | Jeremy Allen | .3510 | 1972-1983 | |
| 29 | Kian Rosbotham# | .3403 | 1982-1988 | |
| 30 | Mike Wiggins# | .3361 | 1980-1990 | |
| 31 | Cliff Bailey | .3321 | 1947-1957 |
