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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Toni Similä# | .4109 | 1932 | |
| 2 | Sigurd Nilsson# | .4096 | 1932 | |
| 3 | Sigurd Nilsson# | .3958 | 1931 | |
| 4 | Toni Similä# | .3946 | 1931 | |
| 5 | Sigurd Nilsson# | .3845 | 1933 | |
| 6 | Reko Häyrynen# | .3814 | 1933 | |
| 7 | Toni Similä# | .3551 | 1933 | |
| 8 | Trevor Horelica# | .3496 | 1933 | |
| 9 | Oskari Eklund# | .3315 | 1931 | |
| 10 | Ilmo Hakanen# | .3231 | 1931 | |
| 11 | Ilmo Hakanen# | .3131 | 1932 | |
| 12 | Tommy Karlsson# | .3127 | 1931 | |
| 13 | Dave Vega# | .3124 | 1933 | |
| 14 | Charles Agyiri# | .2921 | 1931 | |
| 15 | Tommy Karlsson# | .2908 | 1932 | |
| 16 | Terjo Kallio# | .2874 | 1932 | |
| 17 | Jussi Koiranen# | .2811 | 1931 | |
| 18 | Jussi Koiranen# | .2616 | 1932 | |
| 19 | Tommy Karlsson# | .2481 | 1933 |
