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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | David Sullivan# | 3.108 | 2051-2063 | |
| 2 | José Zamora | 3.319 | 2052-2062 | |
| 3 | Morgan Cartier# | 3.363 | 2052-2063 | |
| 4 | James Scott | 3.545 | 2022-2029 | |
| 5 | Chris Sommer | 3.732 | 2028-2038 | |
| 6 | Jamie Miller | 3.830 | 2048-2056 | |
| 7 | Robinson Suárez | 3.853 | 2025-2040 | |
| 8 | Cameron Frye | 3.896 | 2024-2034 | |
| 9 | Jing-quo Ts'ai | 3.899 | 2043-2060 | |
| 10 | Jason McKinney | 3.993 | 2015-2024 | |
| 11 | Juan González# | 4.084 | 2053-2060 | |
| 11 | Rust Cohle | 4.084 | 2027-2040 | |
| 13 | Xiao-shuang Wong | 4.216 | 2032-2039 | |
| 14 | Mauro Ramírez# | 4.253 | 2051-2062 | |
| 15 | Fernando González | 4.310 | 2017-2024 | |
| 16 | Sean Murphy | 4.324 | 2043-2050 | |
| 17 | Edward Whipp | 4.372 | 2023-2029 | |
| 18 | Lorenzo Díaz | 4.496 | 2031-2039 | |
| 19 | Javier Montés | 4.604 | 2039-2048 | |
| 20 | Huai-yu Kan | 4.666 | 2015-2022 | |
| 21 | Domingo Montémayor | 4.682 | 2031-2042 | |
| 22 | Bill Strain | 4.863 | 2052-2059 | |
| 23 | Jorge Vázquez | 4.982 | 2050-2061 | |
| 24 | Júlio Hernández | 4.985 | 2016-2025 | |
| 25 | Kent Horton | 4.993 | 2034-2039 | |
| 26 | Steve Ward | 5.028 | 2053-2060 | |
| 27 | Dean Cross | 5.115 | 2037-2045 | |
| 28 | Francisco Sandoval | 5.144 | 2029-2034 | |
| 29 | Tim Owens | 5.278 | 2039-2048 | |
| 30 | Brian Gardner | 5.322 | 2040-2050 | |
| 31 | José Blanco | 5.324 | 2036-2045 | |
| 32 | Juan Lara | 5.722 | 2025-2029 | |
| 33 | Zuo-lin Liang | 5.802 | 2049-2054 |
