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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Krisi Grannas# | .4348 | 1931 | |
| 2 | Krisi Grannas# | .4089 | 1932 | |
| 3 | Sami Lankinen# | .3752 | 1932 | |
| 4 | Gracjan Derda# | .3685 | 1932 | |
| 5 | Alonso Nova# | .3580 | 1932 | |
| 6 | Krisi Grannas# | .3533 | 1933 | |
| 7 | Sami Lankinen# | .3481 | 1931 | |
| 8 | Alonso Nova# | .3421 | 1931 | |
| 9 | Aatu Auvinen# | .3415 | 1931 | |
| 10 | Sami Lankinen# | .3211 | 1933 | |
| 11 | Matias Marimekko# | .3167 | 1932 | |
| 12 | Olle Karsten# | .2937 | 1932 | |
| 13 | Jussi Koiranen# | .2846 | 1933 |
