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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | David Sullivan# | 1.09 | 2051-2063 | |
| 2 | Morgan Cartier# | 1.14 | 2052-2063 | |
| 3 | José Zamora | 1.15 | 2052-2062 | |
| 4 | Jing-quo Ts'ai | 1.22 | 2043-2060 | |
| 5 | Mauro Ramírez# | 1.24 | 2051-2062 | |
| 5 | Cameron Frye | 1.24 | 2024-2034 | |
| 7 | Jamie Miller | 1.32 | 2048-2056 | |
| 8 | James Scott | 1.35 | 2022-2029 | |
| 8 | Bill Strain | 1.35 | 2052-2059 | |
| 10 | Sean Murphy | 1.36 | 2043-2050 | |
| 11 | Robinson Suárez | 1.37 | 2025-2040 | |
| 11 | Fernando González | 1.37 | 2017-2024 | |
| 11 | Rust Cohle | 1.37 | 2027-2040 | |
| 11 | Jason McKinney | 1.37 | 2015-2024 | |
| 15 | Javier Montés | 1.38 | 2039-2048 | |
| 15 | Xiao-shuang Wong | 1.38 | 2032-2039 | |
| 15 | Lorenzo Díaz | 1.38 | 2031-2039 | |
| 18 | Edward Whipp | 1.39 | 2023-2029 | |
| 19 | Juan González# | 1.41 | 2053-2060 | |
| 19 | Chris Sommer | 1.41 | 2028-2038 | |
| 21 | Zuo-lin Liang | 1.43 | 2049-2054 | |
| 22 | Steve Ward | 1.46 | 2053-2060 | |
| 22 | José Blanco | 1.46 | 2036-2045 | |
| 24 | Huai-yu Kan | 1.48 | 2015-2022 | |
| 24 | Dean Cross | 1.48 | 2037-2045 | |
| 26 | Tim Owens | 1.49 | 2039-2048 | |
| 27 | Júlio Hernández | 1.51 | 2016-2025 | |
| 28 | Domingo Montémayor | 1.52 | 2031-2042 | |
| 28 | Brian Gardner | 1.52 | 2040-2050 | |
| 30 | Kent Horton | 1.53 | 2034-2039 | |
| 31 | Francisco Sandoval | 1.55 | 2029-2034 | |
| 32 | Jorge Vázquez | 1.56 | 2050-2061 | |
| 33 | Juan Lara | 1.71 | 2025-2029 |
