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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Teferi Amar* | .6352 | 1964-1970 | |
| 2 | John Plante* | .5940 | 1958-1977 | |
| 3 | Jun'ichi Shibata | .5820 | 1958-1970 | |
| 4 | Adrian Walcott | .5648 | 1958-1970 | |
| 5 | Tom Smith | .5508 | 1961-1970 | |
| 6 | Manuel Ramírez* | .5476 | 1958-1964 | |
| 7 | Adam Mckay | .5328 | 1958-1967 | |
| 8 | Carlos Cantú* | .5291 | 1958-1967 | |
| 9 | Arlen O'Hagan | .5074 | 1958-1964 | |
| 10 | Adriano Illuminati | .4906 | 1958-1964 | |
| 11 | Sanya Madatov | .4658 | 1961-1981 | |
| 12 | Norberto Torres# | .4529 | 1981-1988 | |
| 13 | Alonso Rivera | .4485 | 1961-1970 | |
| 14 | Mario Sánchez# | .4459 | 1981-1988 | |
| 15 | Roberto Olivares | .4427 | 1964-1970 | |
| 16 | Clyde Alderson | .4352 | 1961-1970 | |
| 17 | Aurelio Viera | .4344 | 1958-1967 | |
| 18 | Kao-tsu Han | .4339 | 1958-1973 | |
| 19 | Teklu Ekundayo | .4327 | 1961-1981 | |
| 20 | Sami Tuulola# | .4242 | 1981-1988 | |
| 21 | Juan Escobar | .4213 | 1958-1964 | |
| 22 | Jordan Were | .4108 | 1970-1981 | |
| 23 | Volk Schummer | .4084 | 1958-1970 | |
| 24 | Jacky Zwager# | .3959 | 1977-1988 | |
| 25 | Luke MacBrayne | .3861 | 1973-1977 | |
| 26 | Ayuba Njama# | .3851 | 1973-1988 | |
| 27 | Marcus Biddle | .3828 | 1961-1970 | |
| 28 | Derrick Stoops | .3824 | 1961-1973 | |
| 29 | Edgar Luna | .3789 | 1964-1981 | |
| 30 | Sieb Ten Wolde | .3750 | 1973-1988 | |
| 31 | Júlio Mendoza | .3701 | 1970-1981 | |
| 32 | Yazid Ayman# | .3696 | 1973-1988 | |
| 33 | Alfredo Ortíz | .3624 | 1973-1988 | |
| 34 | Danny Fitchett | .3617 | 1958-1961 | |
| 35 | Craig Balby | .3525 | 1967-1973 | |
| 36 | José Herrera# | .3515 | 1984-1988 | |
| 37 | Meqwran Ademola# | .3361 | 1977-1984 | |
| 38 | Jeff Picot | .3310 | 1981-1988 | |
| 39 | Ernesto Méndez | .3271 | 1981-1988 | |
| 40 | Ernie Downie | .3246 | 1981-1988 | |
| 41 | Peter van As | .3153 | 1958-1964 | |
| 42 | Conor Boase# | .3140 | 1981-1988 | |
| 43 | Mas'ud bin Hamid | .3071 | 1973-1981 | |
| 44 | Lodovico Cardone | .2951 | 1973-1981 | |
| 45 | Bennie Westerbos | .2923 | 1961-1973 | |
| 46 | Kalle Sinkkonen | .2819 | 1958-1970 | |
| 47 | Tatsuzo Fujii | .2783 | 1970-1977 | |
| 48 | Luis Félix | .2623 | 1973-1988 | |
| 49 | Tom Rainford | .2616 | 1973-1981 | |
| 50 | David Tavoljansky | .2482 | 1967-1977 | |
| 51 | Santtu Viitasalo | .2314 | 1967-1981 | |
| 52 | Hastings Zoeber | .2266 | 1973-1977 | |
| 53 | Tobias Müller | .1860 | 1961-1973 | |
| 54 | Tomas Evered | .1837 | 1973-1981 |
