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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Francisco Vargas# | .5794 | 1979-1991 | |
| 2 | Charlemagne Freeman* | .5735 | 1934-1955 | |
| 3 | Petros Piatkowski* | .4799 | 1970-1978 | |
| 4 | Tamasaburo Abe | .4740 | 1950-1961 | |
| 5 | Norbert Jones* | .4727 | 1946-1953 | |
| 6 | Paul Green | .4571 | 1952-1966 | |
| 7 | Brenden Howson | .4454 | 1964-1970 | |
| 8 | Héctor Cortés | .4217 | 1916-1928 | |
| 9 | Aatto Sala | .4208 | 1976-1990 | |
| 10 | Louis Tiekink | .4191 | 1975-1985 | |
| 11 | James Oswald | .4160 | 1935-1944 | |
| 12 | Ron Swallow# | .4153 | 1977-1991 | |
| 13 | Henry Johnston# | .4152 | 1974-1990 | |
| 14 | Mathias Albertoni* | .4144 | 1953-1969 | |
| 15 | Ángel Velásquez | .4133 | 1920-1929 | |
| 16 | Pedro Quintanilla# | .4114 | 1977-1990 | |
| 17 | Mark Davenport | .4103 | 1914-1926 | |
| 18 | Yunosuke Hayagawa | .4092 | 1971-1986 | |
| 19 | Kifle Kelueljang | .4076 | 1971-1984 | |
| 20 | Theodor Frenkiel | .4020 | 1945-1955 | |
| 21 | Brandon Moore | .4003 | 1911-1917 | |
| 22 | Millard Montgomery | .3982 | 1970-1987 | |
| 23 | Jorge Medrano* | .3978 | 1923-1935 | |
| 24 | Ánibal Romero | .3917 | 1911-1917 | |
| 25 | Raúl Alfonzo | .3915 | 1938-1947 | |
| 26 | Albert McMurrich | .3807 | 1911-1920 | |
| 27 | Mahmud Kapkobi | .3800 | 1970-1977 | |
| 28 | Cristo Gutiérrez | .3784 | 1931-1939 | |
| 29 | Miguel Borbón | .3775 | 1925-1942 | |
| 30 | Battista Caccianemici | .3745 | 1970-1979 | |
| 31 | Evan Leighton# | .3681 | 1976-1991 | |
| 32 | Håkon Olsnes | .3654 | 1971-1981 | |
| 33 | Vasily Jarovtsev | .3598 | 1968-1980 | |
| 34 | Martin Jordan | .3556 | 1970-1981 | |
| 35 | Pedro Pérez | .3298 | 1935-1948 |
