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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Miko Iisalo# | 2.017 | 1931 | |
| 2 | Miko Iisalo# | 2.327 | 1932 | |
| 3 | Mixu Petersen# | 2.621 | 1931 | |
| 4 | Antti Sakaala# | 2.696 | 1932 | |
| 5 | Greger Hassinen# | 2.728 | 1932 | |
| 6 | Mixu Petersen# | 2.806 | 1932 | |
| 7 | Zachary Torres# | 2.817 | 1933 | |
| 8 | Matias Kinnunen# | 2.842 | 1931 | |
| 9 | Settyslas Huttunen# | 2.848 | 1932 | |
| 10 | Matias Kinnunen# | 2.858 | 1932 | |
| 11 | Greger Hassinen# | 2.942 | 1931 | |
| 12 | Teddy Yo# | 2.949 | 1933 | |
| 13 | Greger Hassinen# | 2.989 | 1933 | |
| 14 | Cory Veles# | 3.009 | 1933 | |
| 15 | Miko Iisalo# | 3.049 | 1933 | |
| 16 | Antti Sakaala# | 3.054 | 1931 | |
| 17 | Keke Andersson# | 3.069 | 1931 | |
| 18 | Lars Jansson# | 3.078 | 1931 | |
| 19 | Nik Vasilogiannis# | 3.115 | 1933 | |
| 20 | Lech Draxler# | 3.121 | 1933 | |
| 21 | Lauri Pohjoispää# | 3.213 | 1931 | |
| 22 | Ukko Seppälä# | 3.263 | 1931 | |
| 23 | Mixu Petersen# | 3.287 | 1933 | |
| 24 | Frank Smith# | 3.297 | 1933 | |
| 25 | Theodor Kalto# | 3.325 | 1932 | |
| 26 | Theodor Kalto# | 3.348 | 1931 | |
| 27 | Lucas Nieminen# | 3.364 | 1931 | |
| 28 | Lauri Pohjoispää# | 3.431 | 1932 | |
| 29 | Settyslas Huttunen# | 3.438 | 1933 | |
| 30 | Tauno Aalto# | 3.445 | 1931 | |
| 31 | Erik Byrne# | 3.593 | 1933 | |
| 32 | Rocky Marshall# | 3.639 | 1933 | |
| 33 | Esa Nousiainen# | 3.666 | 1932 | |
| 34 | Kris Fong# | 3.720 | 1933 | |
| 35 | Pellervo Sillanpää# | 3.726 | 1931 | |
| 36 | Will Neito# | 3.757 | 1933 | |
| 37 | Dimitrios Dellas# | 3.810 | 1933 | |
| 38 | Antti Sakaala# | 3.834 | 1933 | |
| 39 | Tommi Välimäki# | 3.852 | 1931 | |
| 40 | Alexander Acostas# | 3.863 | 1933 | |
| 41 | Tommi Välimäki# | 3.944 | 1932 | |
| 42 | Matias Kinnunen# | 3.967 | 1933 | |
| 43 | Kolby Verdier# | 4.056 | 1933 | |
| 44 | Esa Nousiainen# | 4.101 | 1931 | |
| 45 | Settyslas Huttunen# | 4.109 | 1931 | |
| 46 | Àvila Pupo# | 4.114 | 1931 | |
| 47 | Jetsada Kaman# | 4.121 | 1933 | |
| 47 | Lars Jansson# | 4.121 | 1932 | |
| 49 | Theodor Kalto# | 4.124 | 1933 | |
| 50 | Doàn Dô# | 4.129 | 1933 | |
| 51 | Ezekiel Binda# | 4.371 | 1933 | |
| 52 | Jo Morrison# | 4.376 | 1933 | |
| 53 | Lucas Nieminen# | 4.419 | 1932 | |
| 54 | Gerton Uhlgren# | 4.430 | 1931 | |
| 55 | Jimi Sjöroos# | 4.500 | 1931 | |
| 56 | Fred Sheriff# | 4.549 | 1933 | |
| 57 | Marko Laitinen# | 4.558 | 1931 | |
| 58 | Lucas Kams# | 4.584 | 1933 | |
| 59 | Tino Mattsson# | 4.586 | 1931 | |
| 60 | Nuutti Kirvesniemi# | 4.644 | 1931 | |
| 61 | Tommi Avellan# | 4.707 | 1932 | |
| 62 | Nino Marina# | 4.724 | 1932 | |
| 63 | Mikko Kangas# | 4.752 | 1932 | |
| 64 | Lauri Pohjoispää# | 4.828 | 1933 | |
| 65 | Martin Huerta# | 4.838 | 1933 | |
| 66 | Keke Andersson# | 4.914 | 1933 | |
| 67 | Ville Kuvaja# | 4.925 | 1931 | |
| 68 | Teddy Moralez# | 5.008 | 1933 | |
| 69 | Asla Pekkanen# | 5.370 | 1931 | |
| 70 | Marko Laitinen# | 5.581 | 1932 | |
| 71 | Jimi Sjöroos# | 5.777 | 1932 | |
| 72 | Asla Pekkanen# | 6.193 | 1932 | |
| 73 | Vesa-Pekka Mikkonen | 7.645 | 1931 |
