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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Pablo León | 1.046 | 2016-2023 | |
| 2 | António Granados# | 1.042 | 2021-2028 | |
| 3 | Raúl Ruíz# | 1.034 | 2026-2031 | |
| 4 | Bernardo Hernández# | 1.033 | 2024-2028 | |
| 5 | Mark Melton | 1.032 | 2017-2027 | |
| 6 | Joe Craig# | 1.027 | 2023-2031 | |
| 7 | Ed Whitaker | 1.025 | 2015-2027 | |
| 8 | Juan Aguirre# | 1.020 | 2024-2031 | |
| 9 | Dave Henderson# | 1.019 | 2019-2028 | |
| 10 | Pancho Salaedo# | 1.013 | 2021-2031 | |
| 11 | Xavier Hernández# | 1.012 | 2025-2031 | |
| 12 | Curtis Peters# | 1.010 | 2019-2026 | |
| 13 | Wayne Harrison | 1.009 | 2015-2019 | |
| 13 | Cole Shaffer# | 1.009 | 2018-2029 | |
| 15 | Derek Schroeder | 1.005 | 2015-2018 | |
| 16 | José Paz# | 1.002 | 2025-2031 | |
| 17 | Kenzaburo Hori | .994 | 2019-2027 | |
| 18 | Duncan Thomas | .991 | 2017-2023 | |
| 19 | Vicente Toro | .986 | 2019-2022 | |
| 20 | Bob Dickerson# | .961 | 2019-2031 |
