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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Petros Piatkowski* | .5362 | 1967-1979 | |
| 2 | Arthur Mathan* | .5303 | 1916-1933 | |
| 3 | Andrés Alfaro | .4836 | 1974-1984 | |
| 4 | Roscoe Rand | .4618 | 1924-1934 | |
| 5 | Bernhard Funk | .4565 | 1935-1946 | |
| 6 | Frode Bomas* | .4549 | 1955-1972 | |
| 7 | Matt Rolland* | .4458 | 1921-1939 | |
| 8 | Tulu Dunde# | .4428 | 1974-1990 | |
| 9 | Jorge Medrano* | .4333 | 1921-1937 | |
| 10 | Riley Newcombe* | .4331 | 1925-1943 | |
| 11 | Bob Beauchamp | .4305 | 1911-1922 | |
| 12 | Carroll Orkney | .4256 | 1954-1965 | |
| 13 | Tamasaburo Abe | .4243 | 1947-1962 | |
| 14 | Kane Frankland | .4237 | 1916-1928 | |
| 15 | Riley Heaman | .4183 | 1944-1960 | |
| 16 | Hyung-gwang Sim | .4148 | 1951-1965 | |
| 17 | Máximo Orosco | .4139 | 1967-1972 | |
| 18 | Henry Johnston# | .4137 | 1979-1990 | |
| 19 | Dahal Rowe | .4136 | 1924-1940 | |
| 20 | Bronson Bostock | .4129 | 1911-1917 | |
| 21 | Kane Howard | .4117 | 1955-1961 | |
| 22 | Daniel Turpin | .4080 | 1915-1923 | |
| 23 | Cristo Gutiérrez | .4054 | 1924-1930 | |
| 24 | Juan Colón | .4007 | 1958-1971 | |
| 25 | Quentin Cardinale | .3993 | 1936-1946 | |
| 26 | Rikiya Sakurai | .3958 | 1961-1966 | |
| 27 | Kuang-an Ow | .3940 | 1947-1960 | |
| 28 | Harry Coleman | .3895 | 1926-1940 | |
| 29 | Brenden Howson | .3880 | 1957-1967 | |
| 30 | Kristian Sittig | .3861 | 1931-1935 | |
| 31 | Michel Piat | .3859 | 1940-1953 | |
| 32 | Héctor Ortíz# | .3815 | 1981-1990 | |
| 33 | Millard Montgomery | .3804 | 1973-1988 | |
| 34 | Yves Hoarau | .3675 | 1911-1918 | |
| 35 | Dean Marchand | .3652 | 1911-1925 | |
| 36 | Vasily Jarovtsev | .3608 | 1964-1978 | |
| 37 | Mike Lyteman | .3508 | 1929-1935 | |
| 38 | Tabat Komen# | .3402 | 1975-1990 | |
| 39 | Ramón García | .3384 | 1934-1946 | |
| 40 | Wolde-Selassie Ramadhani | .3314 | 1969-1977 | |
| 41 | André Martin | .2925 | 1943-1956 |
