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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Krisi Grannas# | .6095 | 1931-1933 | |
| 2 | Gracjan Derda# | .5054 | 1931-1933 | |
| 2 | Alonso Nova# | .5054 | 1931-1933 | |
| 4 | Brandon Barrera# | .4460 | 1932-1933 | |
| 5 | Sami Lankinen# | .4457 | 1931-1933 | |
| 6 | Jussi Koiranen# | .4315 | 1931-1933 | |
| 7 | Aatu Auvinen# | .4249 | 1931-1933 | |
| 8 | Jere Jormalainen | .4123 | 1931-1932 | |
| 9 | Tuomas Laine# | .4090 | 1931-1933 | |
| 10 | Matias Marimekko# | .3977 | 1931-1933 | |
| 11 | Hugo Munthe# | .3953 | 1931-1933 | |
| 12 | Jani Siljamäki# | .3833 | 1931-1933 | |
| 13 | Esa Haverinen# | .3734 | 1931-1933 | |
| 14 | Olle Karsten# | .3699 | 1931-1933 |
