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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Kalervo Reini# | .6308 | 1980-1985 | |
| 2 | Niel Tarnovius | .5254 | 1961-1970 | |
| 3 | Dong-kyoon Pak | .5178 | 1975-1988 | |
| 4 | Norm Garner | .4990 | 1977-1984 | |
| 5 | Lúcio Sánchez# | .4576 | 1983-1988 | |
| 6 | Freddi Kirchenbauer# | .4571 | 1976-1987 | |
| 7 | Shou-chien Xuan | .4565 | 1982-1988 | |
| 8 | Pedro Domínguez# | .4556 | 1983-1989 | |
| 9 | Dharr Hakem# | .4333 | 1977-1989 | |
| 10 | Mo Wentworth | .4124 | 1912-1919 | |
| 11 | Jesús Herrera | .4092 | 1964-1974 | |
| 12 | Alan Glasspool | .3980 | 1930-1944 | |
| 13 | António Ramírez# | .3820 | 1984-1989 | |
| 14 | Tong Peng | .3517 | 1911-1917 |
