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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Brad Perry | 1.100 | 2015-2026 | |
| 2 | Baldomero Avino# | 1.078 | 2025-2041 | |
| 3 | Jorge Alejándrez# | 1.063 | 2027-2041 | |
| 4 | Chad Armstrong* | 1.060 | 2013-2029 | |
| 5 | Johan Kroening# | 1.050 | 2032-2041 | |
| 6 | Terry Armstrong | 1.044 | 2017-2034 | |
| 7 | Donald Thompson | 1.043 | 2016-2024 | |
| 8 | Chris Smith | 1.032 | 2013-2025 | |
| 9 | Blaze Alexander# | 1.026 | 2033-2041 | |
| 10 | Eddie Sachs# | 1.025 | 2032-2041 | |
| 11 | Gabriel Maldonado | 1.023 | 2021-2034 | |
| 12 | Seishiro Nishimura | 1.004 | 2023-2032 | |
| 13 | Kyoji Hakoda | 1.003 | 2030-2037 | |
| 13 | Min-heui Im | 1.003 | 2015-2026 | |
| 15 | Todd Henry | 1.000 | 2022-2031 | |
| 16 | Tadayoshi Watanabe# | .999 | 2031-2040 | |
| 17 | Ned Durand | .993 | 2024-2035 | |
| 17 | Tomás Martínez | .993 | 2026-2036 | |
| 17 | Michael Neely | .993 | 2019-2029 | |
| 20 | Roberto Sánchez | .988 | 2025-2036 | |
| 21 | Karl Blanke# | .980 | 2032-2041 | |
| 22 | Kenneth Chapman | .968 | 2014-2021 | |
| 23 | Rubén López | .962 | 2017-2024 | |
| 24 | Lupo Cotto# | .959 | 2027-2040 | |
| 25 | Mike Silver* | .958 | 2014-2027 | |
| 26 | Brett Callison | .957 | 2023-2039 | |
| 27 | Bart Lewis | .954 | 2020-2036 | |
| 28 | Lockwood Rose | .945 | 2013-2020 | |
| 29 | Todd Blake | .905 | 2015-2029 | |
| 30 | John Ennis# | .903 | 2027-2041 |
