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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Pepe Fontirroig# | 2.75 | 2035-2037 | |
| 2 | Mauro Sandín# | 2.82 | 2036-2039 | |
| 3 | Jeremiah Hartney# | 3.04 | 2039-2041 | |
| 4 | Emilio Zatori | 3.13 | 2036-2040 | |
| 5 | Malcolm Bullard# | 3.18 | 2033-2036 | |
| 5 | Earl Hurdle# | 3.18 | 2037-2040 | |
| 7 | Blaise Tonetti# | 3.52 | 2038-2042 | |
| 8 | Armando Sosa# | 3.63 | 2037-2039 | |
| 9 | Jin-soo Jan-Hui# | 3.70 | 2034-2036 | |
| 10 | Mark Kirk# | 3.94 | 2036-2038 | |
| 11 | Ronald Hall | 4.09 | 2033-2037 | |
| 12 | Jimmy Young# | 4.17 | 2040-2042 | |
| 13 | Diego Cartaya | 4.21 | 2032-2035 | |
| 13 | Robert Young# | 4.21 | 2039-2041 | |
| 15 | Jack Crabb | 4.45 | 2032-2034 | |
| 16 | Gaberiela Tatafu# | 4.70 | 2033-2036 |
