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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Alberto Díaz# | 1.099 | 2015 | |
| 2 | Roger Vance# | 1.080 | 2015 | |
| 3 | Jorge Vejarano# | 1.054 | 2015 | |
| 4 | Juan Guevara# | 1.052 | 2015 | |
| 4 | Ramón Miranda# | 1.052 | 2015 | |
| 6 | Júlio Mancía# | 1.050 | 2015 | |
| 7 | Gabriel Bauer# | 1.044 | 2015 | |
| 8 | Scott Smith# | 1.031 | 2015 | |
| 9 | Cisco Calderón# | 1.024 | 2015 | |
| 10 | Mario López# | 1.023 | 2015 | |
| 10 | Ramón Fuentes# | 1.023 | 2015 | |
| 12 | Josh Davis# | 1.015 | 2015 | |
| 13 | Bob Baxter# | 1.000 | 2015 | |
| 14 | Robinson Soto# | 0.993 | 2015 | |
| 15 | Mark Stewart# | 0.988 | 2015 | |
| 16 | Esteban Candelária# | 0.960 | 2015 | |
| 17 | David Aragónez# | 0.917 | 2015 | |
| 18 | Mario Cabrera# | 0.895 | 2015 |
