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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Bill Griggs# | 2.375 | 2061-2062 | |
| 2 | Francisco Canó | 3.665 | 2053-2055 | |
| 3 | Alex Wicksted# | 3.678 | 2055-2057 | |
| 4 | Juan Velásquez# | 3.788 | 2060-2061 | |
| 5 | Etienne de Ruijter# | 4.085 | 2056-2057 | |
| 6 | Alfonso Crisci# | 4.097 | 2055-2057 | |
| 7 | José García | 4.536 | 2051-2053 | |
| 8 | José de Jesús Ramos | 4.558 | 2049-2051 | |
| 9 | Fernando Rivera# | 4.870 | 2048-2050 |
