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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Melvin Montano | .6047 | 1970-1973 | |
| 2 | Lew Flick | .5504 | 1940-1942 | |
| 3 | Andy Seminick | .5103 | 1941-1942 | |
| 4 | Alberto Lois | .5010 | 1973-1977 | |
| 5 | George Pfister | .4958 | 1948-1949 | |
| 6 | Mike Butler | .4643 | 1970-1973 | |
| 7 | Nick Kotowski | .4638 | 1972-1974 | |
| 8 | Willie Guzman | .4554 | 1973-1977 | |
| 9 | Andre Shields | .4328 | 1972-1975 | |
| 10 | Armando Martinez | .4247 | 1971-1973 | |
| 11 | Tito Nanni# | .4219 | 1978-1981 | |
| 12 | Alfredo Garcia | .4173 | 1977-1980 | |
| 13 | Steve Rametta | .4172 | 1971-1975 | |
| 14 | Travis Argento | .4140 | 1972-1975 | |
| 15 | Rafael Contreras | .4069 | 1972-1976 | |
| 16 | Kenneth Berger | .4051 | 1973-1979 | |
| 17 | Michael Jones | .4016 | 1973-1978 | |
| 18 | Harvey Gentry | .3966 | 1947-1948 | |
| 19 | Marshall Lowe | .3943 | 1971-1973 | |
| 20 | Jon Alvares | .3909 | 1972-1977 | |
| 21 | Russell Ramirez# | .3899 | 1976-1979 | |
| 22 | Charlie Fox | .3865 | 1942-1947 | |
| 23 | Steve Douglas | .3771 | 1976-1980 | |
| 24 | Joseph Sciarratta | .3690 | 0-0 | |
| 25 | Justin Schnare | .3676 | 1970-1975 | |
| 26 | Igor Roosendaal# | .3528 | 1975-1979 | |
| 27 | Al Gardella | .3522 | 1952-1953 | |
| 28 | Justin Henderson | .3489 | 1972-1974 | |
| 29 | Bernie Creger | .3471 | 1943-1944 | |
| 30 | David Stevens# | .3364 | 1976-1980 | |
| 31 | Romel Beck# | .3275 | 1977-1979 | |
| 32 | Francisco Guerra# | .3222 | 1974-1979 | |
| 33 | Edwin Mohr# | .2926 | 1975-1981 | |
| 34 | Michael Lanum# | .2849 | 1979-1981 |
