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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Toni Egberg# | .4183 | 1931-1933 | |
| 2 | Håkan Suonperä# | .4170 | 1931-1933 | |
| 3 | Timo Yrjänäinen# | .4027 | 1931-1933 | |
| 4 | William Hon# | .3860 | 1931-1933 | |
| 5 | Keke Nuutinen# | .3719 | 1931-1933 | |
| 6 | Jari-Pekka Esselström# | .3632 | 1932-1933 | |
| 7 | Jerker Oijusluoma# | .3614 | 1931-1933 | |
| 8 | Hannes Ranne# | .3586 | 1931-1933 | |
| 9 | Timo Laanti# | .3067 | 1931-1932 | |
| 10 | Aleksei Ruth# | .3061 | 1931-1933 | |
| 11 | Igor Vilppunen# | .2953 | 1932-1933 |
