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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Toni Egberg# | .4506 | 1931-1933 | |
| 2 | Juho Mallenius# | .4342 | 1931-1933 | |
| 3 | Niki Karvonen# | .4149 | 1931-1933 | |
| 4 | Olafur Thor Ingólfsson# | .4132 | 1932-1933 | |
| 5 | Paolo Macheda# | .4109 | 1933-1933 | |
| 6 | Harri-Pekka Liimatainen# | .4022 | 1931-1933 | |
| 7 | Noel Räisänen# | .3979 | 1931-1933 | |
| 8 | Arho Narkiniemi# | .3928 | 1931-1933 | |
| 9 | Kai Jaukkuri# | .3854 | 1931-1933 | |
| 10 | Perttu Patrikainen# | .3832 | 1931-1933 | |
| 11 | Petrus Kraatari# | .3685 | 1931-1933 | |
| 12 | Alpo Talonen# | .3597 | 1931-1933 | |
| 13 | Jukka Kirvesniemi# | .3499 | 1931-1933 | |
| 14 | Eino Kassila# | .3281 | 1931-1933 |
