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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Ray Sears* | 1.059 | 2013-2028 | |
| 2 | Ed Hopkins | 1.050 | 2018-2027 | |
| 3 | Bartolo Morales# | 1.048 | 2022-2036 | |
| 4 | Sake van Arem# | 1.039 | 2023-2036 | |
| 5 | Arturo Rodríguez# | 1.036 | 2026-2036 | |
| 5 | Juan Jose Ayala# | 1.036 | 2025-2036 | |
| 7 | Matt Sheppard | 1.035 | 2019-2032 | |
| 8 | António Martínez# | 1.033 | 2024-2036 | |
| 9 | David Edwards# | 1.014 | 2019-2035 | |
| 10 | Hugh Mungus# | 1.012 | 2027-2036 | |
| 11 | Domingo García | 1.008 | 2017-2024 | |
| 12 | Billy Dotson# | 1.005 | 2030-2036 | |
| 13 | Nate Cates | 1.004 | 2016-2028 | |
| 14 | Brian O'Brian | 1.003 | 2013-2022 | |
| 15 | Yataro Kodo# | .997 | 2028-2035 | |
| 16 | Gabriel Rodríguez | .988 | 2018-2029 | |
| 17 | Bob Campbell | .979 | 2014-2025 | |
| 18 | Tamasaburo Kato# | .973 | 2021-2036 | |
| 19 | Cristo González# | .968 | 2022-2033 | |
| 20 | Herman Hayes | .964 | 2015-2029 | |
| 21 | Julián De Paz# | .943 | 2031-2035 |
