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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Alejandro Arteaga# | 1.28 | 2024-2028 | |
| 2 | Augusto Ramos# | 1.31 | 2026-2028 | |
| 3 | Alin Oanta# | 1.39 | 2020-2027 | |
| 4 | Ricky Jackson# | 1.47 | 2025-2028 | |
| 4 | Cipriano Costa# | 1.47 | 2020-2028 | |
| 6 | Bayram Tanaoglu# | 1.48 | 2023-2028 | |
| 7 | Eduardo Bravo# | 1.49 | 2025-2028 | |
| 8 | Armando Hernández | 1.50 | 2020-2022 | |
| 9 | Benjamin Brouwer | 1.66 | 2017-2019 | |
| 10 | Felipe Gutiérrez | 1.67 | 2016-2019 | |
| 11 | Eric Lang# | 1.68 | 2017-2021 | |
| 11 | Tony Madden | 1.68 | 2015-2021 | |
| 13 | Robert Archer | 1.71 | 2016-2022 |
