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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 | Luis Gutiérrez | 1.045 | 2015-2018 | |
| 4 | Arturo Rodríguez# | 1.043 | 2026-2033 | |
| 5 | Bartolo Morales# | 1.042 | 2022-2033 | |
| 6 | Alden Wiley | 1.036 | 2019-2031 | |
| 7 | Matt Sheppard | 1.035 | 2019-2032 | |
| 7 | Juan Jose Ayala# | 1.035 | 2025-2033 | |
| 9 | António Martínez# | 1.033 | 2024-2033 | |
| 10 | Hugh Mungus# | 1.023 | 2027-2033 | |
| 10 | Billy Dotson# | 1.023 | 2030-2033 | |
| 12 | Iván Vargas | 1.018 | 2017-2022 | |
| 13 | David Edwards# | 1.016 | 2019-2033 | |
| 14 | Domingo García | 1.008 | 2017-2024 | |
| 15 | Nate Cates | 1.004 | 2016-2028 | |
| 16 | Brian O'Brian | 1.003 | 2013-2022 | |
| 17 | Yataro Kodo# | .999 | 2028-2033 | |
| 18 | Gregory Johnson | .995 | 2018-2025 | |
| 19 | Alex Niemann# | .988 | 2027-2031 | |
| 19 | Gabriel Rodríguez | .988 | 2018-2029 | |
| 21 | Bob Campbell | .979 | 2014-2025 | |
| 22 | Louis Gibbons# | .974 | 2028-2032 | |
| 23 | Tamasaburo Kato# | .973 | 2021-2033 | |
| 24 | Herman Hayes | .964 | 2015-2029 | |
| 25 | Pedro Willis | .923 | 2013-2024 | |
| 26 | Brett Callison# | .892 | 2023-2033 |
