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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Shigemasa Sato* | .5415 | 1926-1943 | |
| 2 | Rafael Martínez* | .5063 | 1927-1943 | |
| 3 | Callum Bourke | .5018 | 1954-1974 | |
| 4 | Carlos Helásquez | .4869 | 1964-1983 | |
| 5 | Herb Jackson* | .4718 | 1911-1927 | |
| 6 | Jason Henry | .4590 | 1971-1987 | |
| 7 | Tony Daley | .4575 | 1961-1978 | |
| 8 | Fred Roberts* | .4517 | 1919-1932 | |
| 9 | Lance Kaiser | .4422 | 1943-1956 | |
| 10 | Christian Cook# | .4366 | 1978-1990 | |
| 11 | Ricardo Ortíz | .4343 | 1959-1970 | |
| 12 | Germán Hernández | .4338 | 1955-1965 | |
| 13 | Wop Ouwens# | .4277 | 1976-1991 | |
| 14 | José Bonilla | .4246 | 1930-1936 | |
| 15 | Vincente Dávila | .4200 | 1965-1979 | |
| 16 | Elmer Young | .4139 | 1978-1988 | |
| 17 | Mike Rúbio | .4132 | 1955-1967 | |
| 18 | Steven Powell# | .4110 | 1982-1989 | |
| 19 | Arnim Wille | .4096 | 1960-1977 | |
| 20 | Bill Collier* | .4092 | 1926-1942 | |
| 21 | Jorge Durán | .4091 | 1914-1925 | |
| 22 | Jeremy Wilson | .4085 | 1936-1947 | |
| 23 | Ben MacGruder | .4012 | 1911-1918 | |
| 24 | Raúl Martínez | .3956 | 1969-1980 | |
| 25 | Juan Carlos Rodríguez | .3924 | 1918-1930 | |
| 26 | Radislav Mares | .3909 | 1975-1983 | |
| 27 | Wayne Cramphorn | .3882 | 1927-1933 | |
| 28 | Charlie Butler | .3873 | 1977-1987 | |
| 29 | Ari Frece | .3811 | 1932-1952 | |
| 30 | Gary Lee | .3618 | 1939-1951 | |
| 31 | Jesús García | .3555 | 1914-1922 | |
| 32 | Howard Wagner | .3541 | 1935-1942 | |
| 33 | Joe Walker | .3489 | 1977-1982 |
