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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Andre Dixon | 1.041 | 2016-2019 | |
| 2 | Roland Deschain# | 1.040 | 2026-2038 | |
| 3 | Bernardo Herrera | 1.036 | 2019-2035 | |
| 4 | Mario Castillo# | 1.031 | 2032-2038 | |
| 5 | Tim Barnes | 1.022 | 2017-2027 | |
| 6 | Juanito González# | 1.018 | 2032-2038 | |
| 7 | Bob Heller | 1.016 | 2015-2026 | |
| 8 | Thom Wilcox* | 1.010 | 2013-2028 | |
| 9 | Ki-tak Im | 1.008 | 2024-2036 | |
| 10 | Jorge Trevino | 1.006 | 2019-2026 | |
| 11 | Edward Sterrenburg# | 1.005 | 2034-2038 | |
| 12 | Melito Báez# | 1.004 | 2028-2038 | |
| 13 | Tony Romero | 1.003 | 2023-2038 | |
| 14 | Nelson Jaramillo# | 1.002 | 2029-2038 | |
| 14 | Juan Cabrera | 1.002 | 2015-2036 | |
| 16 | Tamasaburo Kato | .997 | 2021-2037 | |
| 17 | Raúl Ortíz | .994 | 2025-2032 | |
| 18 | Bob Campbell | .993 | 2014-2025 | |
| 19 | Noel Ballard | .992 | 2017-2034 | |
| 20 | Travis Newsome | .973 | 2020-2032 | |
| 21 | Xavier Hernández# | .965 | 2026-2038 |
