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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Baldomero Avino# | 1.102 | 2025-2035 | |
| 2 | Brad Perry | 1.100 | 2015-2026 | |
| 3 | Chad Armstrong* | 1.060 | 2013-2029 | |
| 4 | Terry Armstrong | 1.044 | 2017-2034 | |
| 5 | Donald Thompson | 1.043 | 2016-2024 | |
| 6 | Chris Smith | 1.032 | 2013-2025 | |
| 7 | Gabriel Maldonado | 1.023 | 2021-2034 | |
| 8 | Seishiro Nishimura | 1.004 | 2023-2032 | |
| 9 | Kyoji Hakoda# | 1.003 | 2030-2035 | |
| 9 | Min-heui Im | 1.003 | 2015-2026 | |
| 11 | Todd Henry | 1.000 | 2022-2031 | |
| 12 | Tadayoshi Watanabe# | .999 | 2031-2035 | |
| 13 | Ned Durand | .993 | 2024-2035 | |
| 13 | Tomás Martínez# | .993 | 2026-2034 | |
| 13 | Michael Neely | .993 | 2019-2029 | |
| 16 | Lupo Cotto# | .976 | 2027-2035 | |
| 17 | Kenneth Chapman | .968 | 2014-2021 | |
| 18 | Rubén López | .962 | 2017-2024 | |
| 19 | Mike Silver* | .958 | 2014-2027 | |
| 20 | Brett Callison# | .957 | 2023-2035 | |
| 21 | Bart Lewis# | .954 | 2020-2035 | |
| 22 | Lockwood Rose | .945 | 2013-2020 | |
| 23 | John Ennis# | .918 | 2027-2035 | |
| 24 | Todd Blake | .905 | 2015-2029 |
