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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | James Scott | 3.545 | 2022-2029 | |
| 2 | Chris Sommer | 3.732 | 2028-2038 | |
| 3 | Robinson Suárez | 3.853 | 2025-2040 | |
| 4 | Cameron Frye | 3.896 | 2024-2034 | |
| 5 | Jason McKinney | 3.993 | 2015-2024 | |
| 6 | Rust Cohle | 4.084 | 2027-2040 | |
| 7 | Xiao-shuang Wong | 4.216 | 2032-2039 | |
| 8 | Fernando González | 4.310 | 2017-2024 | |
| 9 | Edward Whipp | 4.372 | 2023-2029 | |
| 10 | Lorenzo Díaz | 4.496 | 2031-2039 | |
| 11 | Huai-yu Kan | 4.666 | 2015-2022 | |
| 12 | Domingo Montémayor | 4.682 | 2031-2042 | |
| 13 | Javier Montés# | 4.737 | 2039-2046 | |
| 14 | Júlio Hernández | 4.985 | 2016-2025 | |
| 15 | Kent Horton# | 4.993 | 2034-2039 | |
| 16 | Dean Cross# | 5.115 | 2037-2045 | |
| 17 | Francisco Sandoval | 5.144 | 2029-2034 | |
| 18 | Tim Owens# | 5.278 | 2039-2046 | |
| 19 | José Blanco# | 5.324 | 2036-2045 | |
| 20 | Brian Gardner# | 5.589 | 2040-2046 | |
| 21 | Juan Lara | 5.722 | 2025-2029 |
