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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Roberto Macías | 1.097 | 1937-1945 | |
| 2 | Phillip Cameron | 1.057 | 1946-1952 | |
| 3 | Kent Rodríguez Jr.# | 1.043 | 1986-1991 | |
| 4 | Santiago Mejía | 1.022 | 1978-1988 | |
| 5 | Bill Gross | 1.019 | 1974-1987 | |
| 6 | Juan Pérez | 1.003 | 1948-1955 | |
| 7 | Larry Carey | 0.929 | 1946-1958 |
