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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Mark McClear | 1.058 | 2018-2028 | |
| 2 | Ed Hopkins | 1.057 | 2021-2029 | |
| 3 | Arturo Rodríguez# | 1.055 | 2027-2033 | |
| 4 | Matt Sheppard | 1.050 | 2015-2032 | |
| 5 | Kevin Howard* | 1.028 | 2014-2021 | |
| 6 | Hugh Mungus# | 1.022 | 2027-2033 | |
| 7 | Fernando Rivera# | 1.020 | 2026-2033 | |
| 8 | Nathan Boswell | 1.016 | 2021-2027 | |
| 9 | Stefano Gaddi# | 1.010 | 2023-2032 | |
| 10 | Kade Knowles# | 1.008 | 2022-2026 | |
| 11 | António Padilla# | 1.004 | 2023-2029 | |
| 12 | Gustavo Mateo# | 1.003 | 2020-2033 | |
| 13 | John MacGregor | 1.001 | 2016-2029 | |
| 14 | Juan Ávila | .998 | 2017-2025 | |
| 14 | Ludwig Kluge# | .998 | 2022-2033 | |
| 16 | António Martínez# | .997 | 2024-2033 | |
| 17 | Luis Muńóz | .995 | 2019-2025 | |
| 18 | Herman Hayes | .988 | 2016-2029 | |
| 19 | Cory Staton | .985 | 2016-2020 | |
| 20 | Brian O'Brian | .984 | 2017-2022 | |
| 21 | Carlos Rodríguez# | .962 | 2022-2033 | |
| 22 | Brett Callison# | .946 | 2023-2033 |
