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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Simeon Lucas | 1.103 | 2016-2023 | |
| 2 | Luis Torrens | 1.083 | 2018-2025 | |
| 3 | Austin Hedges | 1.081 | 2015-2022 | |
| 4 | Taylor Ward# | 1.080 | 2020-2025 | |
| 5 | Blake Swihart | 1.065 | 2015-2021 | |
| 6 | Russell Martin | 1.055 | 2015-2019 | |
| 7 | Michael Hickman | 1.046 | 2022-2025 | |
| 8 | Oscar Hernandez | 1.031 | 2016-2024 | |
| 9 | Yasmani Grandal | 1.028 | 2015-2017 | |
| 9 | Salvador Perez | 1.028 | 2015-2024 | |
| 11 | J.T. Realmuto | 1.027 | 2015-2024 | |
| 11 | Yan Gomes | 1.027 | 2015-2023 | |
| 13 | Reese McGuire# | 1.024 | 2017-2025 | |
| 14 | Max Stassi# | 1.022 | 2016-2025 | |
| 15 | T.J. Collett# | 1.020 | 2020-2025 | |
| 16 | Andrew Knapp | 1.019 | 2018-2022 | |
| 17 | Travis d'Arnaud | .995 | 2015-2019 | |
| 18 | Justin O'Conner | .989 | 2016-2024 | |
| 18 | Tom J. Murphy# | .989 | 2018-2025 | |
| 18 | Buster Posey* | .989 | 2015-2023 | |
| 21 | Scott Bradley Jr.# | .988 | 2021-2025 | |
| 22 | Yadier Molina | .983 | 2015-2018 | |
| 23 | Tyler Marlette | .968 | 2018-2022 | |
| 24 | Kevin Plawecki# | .967 | 2016-2025 | |
| 25 | Carlton Fisk# | .962 | 2020-2025 | |
| 26 | Kyle Skipworth | .960 | 2016-2022 | |
| 27 | Austin Allen# | .957 | 2018-2025 | |
| 28 | Andrew Susac | .956 | 2018-2024 | |
| 29 | Jonathan Lucroy | .953 | 2015-2020 | |
| 30 | Caleb Raleigh# | .946 | 2018-2025 | |
| 31 | Ryan Casteel# | .944 | 2017-2025 | |
| 32 | Josmil Pinto | .937 | 2015-2020 | |
| 33 | Zack Collins# | .927 | 2019-2025 |
