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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Francisco Burgos# | 0.90 | 2025-2028 | |
| 2 | Gonzalo Montés# | 1.00 | 2022-2026 | |
| 3 | Ramiro García# | 1.01 | 2022-2024 | |
| 4 | Armando Ortíz# | 1.08 | 2021-2025 | |
| 4 | António Marés# | 1.08 | 2021-2022 | |
| 4 | Luis Hernández# | 1.08 | 2025-2026 | |
| 7 | Enrique Madrid | 1.10 | 2021-2023 | |
| 7 | Josef Strolz# | 1.10 | 2023-2025 | |
| 9 | Manuel Ceja# | 1.11 | 2027-2028 | |
| 10 | Rusty Swanson# | 1.13 | 2023-2025 | |
| 11 | Eddie Kop# | 1.14 | 2020-2022 | |
| 11 | Bob Browning# | 1.14 | 2023-2025 | |
| 13 | Alejandro Ramos# | 1.15 | 2021-2025 | |
| 13 | Osiris St. Brown# | 1.15 | 2027-2028 | |
| 15 | Loren Berdine# | 1.16 | 2027-2029 | |
| 16 | Darius Baxa# | 1.17 | 2025-2026 | |
| 17 | Morihiro Sai# | 1.18 | 2025-2027 | |
| 17 | Ismael Lara# | 1.18 | 2024-2027 | |
| 17 | Edward Scarborough# | 1.18 | 2026-2029 | |
| 20 | António Muñóz# | 1.19 | 2026-2027 | |
| 21 | Natalino Golaio# | 1.20 | 2020-2021 | |
| 21 | Pedro Adame# | 1.20 | 2026-2028 | |
| 23 | José Santiago# | 1.21 | 2024-2027 | |
| 23 | Chet Saks# | 1.21 | 2027-2028 | |
| 25 | Nick Richie# | 1.22 | 2022-2024 | |
| 26 | Alberto Solís# | 1.23 | 2025-2027 | |
| 27 | José López# | 1.25 | 2026-2028 | |
| 28 | Hänsel Freeh | 1.26 | 2020-2021 | |
| 29 | Gabriel Escobar# | 1.27 | 2022-2025 | |
| 30 | Pang Qin# | 1.30 | 2026-2027 | |
| 31 | Sjoerd Reynoud# | 1.32 | 2027-2029 | |
| 32 | Javier Matajudíos# | 1.39 | 2023-2026 | |
| 33 | Heyg Lamper# | 1.40 | 2025-2027 | |
| 34 | Luis Bustamante# | 1.42 | 2027-2029 | |
| 34 | Jorge Villanueva# | 1.42 | 2027-2029 | |
| 34 | Felipe Pereira# | 1.42 | 2024-2027 | |
| 37 | Marnix van Rijn# | 1.43 | 2026-2029 | |
| 38 | Ryan Dull# | 1.52 | 2024-2028 | |
| 39 | Santiago Carrión# | 1.59 | 2021-2022 |
