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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Alfredo Chávez# | 1.106 | 2019 | |
| 2 | Juan Ríos# | 1.097 | 2019 | |
| 3 | Kevin Sanderson# | 1.042 | 2019 | |
| 4 | Luis Antonio Hernández# | 1.029 | 2019 | |
| 5 | Terry Conley# | 1.028 | 2019 | |
| 6 | José Marín# | 0.978 | 2019 | |
| 7 | Henry Cameron# | 0.965 | 2019 | |
| 8 | Ramón Cruz# | 0.854 | 2019 |
