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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Josh Almonte | 1.054 | 2014-2017 | |
| 2 | Mike Papi# | 1.026 | 2017-2025 | |
| 3 | Rhett Wiseman# | 1.025 | 2018-2025 | |
| 4 | Willie Abreu | 1.012 | 2019-2021 | |
| 5 | Reed Rohlman | 0.993 | 2019-2022 | |
| 6 | Jhailyn Ortiz# | 0.971 | 2018-2020 |
