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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OPS | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Toni Similä# | .9499 | 1932 | |
| 2 | Toni Similä# | .9230 | 1931 | |
| 3 | Sigurd Nilsson# | .8863 | 1932 | |
| 4 | Reko Häyrynen# | .8569 | 1933 | |
| 5 | Trevor Horelica# | .8544 | 1933 | |
| 6 | Toni Similä# | .8413 | 1933 | |
| 7 | Sigurd Nilsson# | .8311 | 1931 | |
| 8 | Sigurd Nilsson# | .8251 | 1933 | |
| 9 | Tommy Karlsson# | .8042 | 1931 | |
| 10 | Ilmo Hakanen# | .7777 | 1931 | |
| 11 | Ilmo Hakanen# | .7414 | 1932 | |
| 12 | Dave Vega# | .7211 | 1933 | |
| 13 | Tommy Karlsson# | .7100 | 1932 | |
| 14 | Oskari Eklund# | .7047 | 1931 | |
| 15 | Charles Agyiri# | .6313 | 1931 | |
| 16 | Tommy Karlsson# | .6236 | 1933 | |
| 16 | Jussi Koiranen# | .6236 | 1931 | |
| 18 | Jussi Koiranen# | .6020 | 1932 | |
| 19 | Terjo Kallio# | .5988 | 1932 |
