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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Reino Orava# | .5278 | 1931-1933 | |
| 2 | Juuso Wickström# | .5055 | 1931-1933 | |
| 3 | Urpo Setälä# | .4981 | 1931-1933 | |
| 4 | Marcus Kirstinä# | .4845 | 1931-1932 | |
| 5 | Herman Samuel# | .4817 | 1932-1933 | |
| 6 | Aapo Setälä# | .4624 | 1931-1933 | |
| 7 | Aati Wiberg# | .4533 | 1931-1933 | |
| 8 | Loki Seilonen# | .4466 | 1931-1933 | |
| 9 | Dani Karjalainen# | .4465 | 1931-1933 | |
| 10 | Samuel Väisänen# | .4232 | 1931-1933 | |
| 11 | Anssi Paksuniemi# | .3806 | 1931-1933 | |
| 12 | Sven-Erik Mäkimattila# | .3776 | 1931-1933 | |
| 13 | Raimo Lahti# | .3750 | 1931-1933 | |
| 14 | Mohamed Zadi# | .3664 | 1932-1933 | |
| 15 | Kapani Habibi# | .3628 | 1932-1933 | |
| 16 | Thomas Prince# | .3455 | 1933-1933 | |
| 17 | Edward Larsson# | .3202 | 1932-1933 |
