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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Nasim Nunez# | 1.128 | 2020 | |
| 2 | Aaron Relle# | 1.107 | 2020 | |
| 3 | Yordys Valdes# | 1.057 | 2020 | |
| 3 | Joey Moore# | 1.057 | 2020 | |
| 5 | Jelfry Marte# | 1.050 | 2020 | |
| 5 | Ji-hwan Bae# | 1.050 | 2020 | |
| 7 | Marcos Gonzalez# | 1.041 | 2020 | |
| 8 | Jeremy Wardlow# | 1.040 | 2020 | |
| 9 | Adam Hall# | 1.032 | 2020 | |
| 10 | Anthony Volpe# | 1.011 | 2020 | |
| 11 | Christian Cairo# | 1.003 | 2020 | |
| 11 | Miguel Hernandez# | 1.003 | 2020 | |
| 11 | Cesar Jimenez# | 1.003 | 2020 | |
| 14 | Dilan Rosario# | 1.000 | 2020 | |
| 15 | Tsung-Che Cheng# | 0.996 | 2020 | |
| 16 | Angel Martinez# | 0.985 | 2020 | |
| 17 | Orelvis Martinez# | 0.981 | 2020 | |
| 18 | Wander Javier# | 0.973 | 2020 | |
| 19 | Osiris Johnson# | 0.968 | 2020 | |
| 20 | Hunter Haas# | 0.939 | 2020 | |
| 21 | Alejandro Pie# | 0.932 | 2020 | |
| 22 | Owen Cobb# | 0.914 | 2020 |
