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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | James Scott | 3.54 | 2022-2029 | |
| 2 | Chris Sommer | 3.73 | 2028-2038 | |
| 3 | Robinson Suárez | 3.85 | 2025-2040 | |
| 4 | Cameron Frye | 3.90 | 2024-2034 | |
| 5 | Jason McKinney | 3.99 | 2015-2024 | |
| 6 | Rust Cohle | 4.08 | 2027-2040 | |
| 7 | Xiao-shuang Wong | 4.22 | 2032-2039 | |
| 8 | Fernando González | 4.31 | 2017-2024 | |
| 9 | Edward Whipp | 4.37 | 2023-2029 | |
| 10 | Lorenzo Díaz | 4.50 | 2031-2039 | |
| 11 | Huai-yu Kan | 4.67 | 2015-2022 | |
| 12 | Domingo Montémayor | 4.68 | 2031-2042 | |
| 13 | Júlio Hernández | 4.99 | 2016-2025 | |
| 13 | Kent Horton# | 4.99 | 2034-2039 | |
| 15 | Francisco Sandoval | 5.14 | 2029-2034 | |
| 16 | José Blanco# | 5.15 | 2036-2043 | |
| 17 | Tim Owens# | 5.35 | 2039-2043 | |
| 18 | Juan Lara | 5.72 | 2025-2029 |
