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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Armando Ortíz# | 1.08 | 2021-2025 | |
| 1 | António Marés# | 1.08 | 2021-2022 | |
| 3 | Josef Strolz# | 1.10 | 2023-2025 | |
| 4 | Bob Browning# | 1.14 | 2023-2025 | |
| 5 | Alejandro Ramos# | 1.15 | 2021-2025 | |
| 6 | Loren Berdine# | 1.16 | 2027-2029 | |
| 7 | Morihiro Sai | 1.18 | 2025-2027 | |
| 7 | Ismael Lara# | 1.18 | 2024-2027 | |
| 7 | Edward Scarborough# | 1.18 | 2026-2029 | |
| 10 | Pedro Adame# | 1.20 | 2026-2028 | |
| 11 | Alberto Solís# | 1.23 | 2025-2027 | |
| 12 | José López# | 1.25 | 2026-2028 | |
| 13 | Hänsel Freeh | 1.26 | 2020-2021 | |
| 14 | Gabriel Escobar# | 1.27 | 2022-2025 | |
| 15 | Sjoerd Reynoud# | 1.32 | 2027-2029 | |
| 16 | Zach Pinyerrel# | 1.41 | 2029-2031 | |
| 17 | Felipe Pereira# | 1.42 | 2024-2027 | |
| 18 | Kent Horton# | 1.45 | 2030-2032 | |
| 19 | Ryan Dull# | 1.52 | 2024-2028 |
