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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Roland Deschain# | 1.042 | 2026-2037 | |
| 2 | Andre Dixon | 1.041 | 2016-2019 | |
| 3 | Bernardo Herrera | 1.036 | 2019-2035 | |
| 4 | Tim Barnes | 1.022 | 2017-2027 | |
| 5 | Bob Heller | 1.016 | 2015-2026 | |
| 6 | Thom Wilcox* | 1.010 | 2013-2028 | |
| 7 | Ki-tak Im | 1.008 | 2024-2036 | |
| 8 | Edward Sterrenburg# | 1.007 | 2034-2037 | |
| 9 | Jorge Trevino | 1.006 | 2019-2026 | |
| 10 | Melito Báez# | 1.004 | 2028-2037 | |
| 11 | Tony Romero# | 1.003 | 2023-2037 | |
| 12 | Nelson Jaramillo# | 1.002 | 2029-2037 | |
| 12 | Juan Cabrera | 1.002 | 2015-2036 | |
| 14 | Tamasaburo Kato# | .997 | 2021-2037 | |
| 15 | Raúl Ortíz | .994 | 2025-2032 | |
| 16 | Bob Campbell | .993 | 2014-2025 | |
| 17 | Noel Ballard | .992 | 2017-2034 | |
| 18 | Xavier Hernández# | .978 | 2026-2037 | |
| 19 | Travis Newsome | .973 | 2020-2032 |
