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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Jesús Ortíz | 1.116 | 2032-2035 | |
| 2 | Theodore Brennan | 1.061 | 2025-2033 | |
| 3 | Jose Bonilla | 1.060 | 2043-2054 | |
| 4 | Jeff Mitchell | 1.053 | 2032-2044 | |
| 5 | Jimmy Theriot | 1.052 | 2039-2050 | |
| 6 | Salvatore Marroquin | 1.047 | 2035-2039 | |
| 7 | Fujio Minami | 1.045 | 2044-2050 | |
| 8 | Mark McGwire Jr. | 1.043 | 2043-2056 | |
| 9 | Desmond Waters | 1.039 | 2024-2029 | |
| 9 | Oscar Garcia | 1.039 | 2036-2046 | |
| 11 | Eric Marino | 1.031 | 2039-2051 | |
| 12 | Gabriel Menchaca | 1.024 | 2044-2056 | |
| 13 | Samuel Redden# | 1.020 | 2052-2059 | |
| 13 | Izzy Barron | 1.020 | 2043-2059 | |
| 15 | Scott McFarland | 1.019 | 2033-2045 | |
| 16 | Tim Nugent | 1.016 | 2046-2056 | |
| 17 | Mario Pantoja | 1.015 | 2021-2028 | |
| 18 | Lee Collier | 1.014 | 2021-2028 | |
| 19 | Chris Joseph | 1.012 | 2019-2026 | |
| 20 | Brad Boswell | 1.009 | 2045-2055 | |
| 21 | Aftab Mengal | 1.003 | 2026-2031 | |
| 22 | Aaron Myron | 0.997 | 2038-2043 | |
| 23 | Ryan Kirby | 0.992 | 2015-2023 | |
| 24 | César Silva | 0.989 | 2015-2030 | |
| 25 | Ji-hoon Park | 0.979 | 2033-2042 | |
| 26 | Terry Simmon | 0.977 | 2034-2045 | |
| 27 | Dave Watson | 0.961 | 2022-2033 | |
| 28 | Ming-an Woo | 0.956 | 2023-2034 | |
| 29 | Jake Hunt | 0.951 | 2015-2026 | |
| 30 | Zach Davis | 0.947 | 2038-2045 | |
| 31 | Billy Diaz | 0.857 | 2045-2055 |
