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|
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Sherwood Aguilar | 1.758 | 1993-1997 | |
| 2 | Júlio López | 2.100 | 2005-2012 | |
| 3 | John Spens | 2.395 | 1973-1979 | |
| 4 | Stu Ellis | 2.538 | 1972-1976 | |
| 5 | Santiago Cruz | 2.633 | 1971-1976 | |
| 6 | Jorge Encarnación | 2.662 | 1968-1974 | |
| 7 | Francisco Silva# | 2.718 | 2007-2012 | |
| 8 | Darren Smith# | 2.940 | 2006-2012 | |
| 9 | Kazuhiro Ono | 2.950 | 1968-1981 | |
| 10 | Emílio Vásquez | 3.218 | 1961-1965 | |
| 11 | Gerald May# | 3.303 | 2008-2015 | |
| 12 | Peter Simpson# | 4.124 | 2008-2015 | |
| 13 | David Lamparello# | 4.229 | 2007-2014 | |
| 14 | Stephen Jones# | 4.251 | 2009-2015 |
