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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Krisi Grannas# | .3995 | 1931-1933 | |
| 2 | Tuomas Laine# | .3743 | 1931-1933 | |
| 3 | Esa Haverinen# | .3679 | 1931-1933 | |
| 4 | Gracjan Derda# | .3592 | 1931-1933 | |
| 5 | Alonso Nova# | .3500 | 1931-1933 | |
| 6 | Sami Lankinen# | .3484 | 1931-1933 | |
| 7 | Hugo Munthe# | .3419 | 1931-1933 | |
| 8 | Aatu Auvinen# | .3415 | 1931-1933 | |
| 9 | Brandon Barrera# | .3263 | 1932-1933 | |
| 10 | Jani Siljamäki# | .3237 | 1931-1933 | |
| 11 | Matias Marimekko# | .3197 | 1931-1933 | |
| 12 | Olle Karsten# | .3159 | 1931-1933 | |
| 13 | Jussi Koiranen# | .2846 | 1931-1933 | |
| 14 | Jere Jormalainen | .2787 | 1931-1932 |
