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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Ralph Dean | 0.77 | 2010-2013 | |
| 2 | Carlos Moreno | 0.90 | 2007-2012 | |
| 3 | José Prieto# | 0.92 | 2030-2042 | |
| 4 | Harry Sullivan | 0.93 | 2011-2012 | |
| 4 | Jesús Muñóz# | 0.93 | 2026-2042 | |
| 6 | Luis Mendoza# | 0.94 | 2033-2042 | |
| 7 | Diego Quiñones# | 0.95 | 2033-2042 | |
| 8 | Ricardo Martínez | 1.02 | 2027-2034 | |
| 8 | Arthur Graham | 1.02 | 2013-2018 | |
| 10 | Félix Villalobas# | 1.03 | 2024-2042 | |
| 11 | José Bernal# | 1.05 | 2032-2042 | |
| 11 | Álex Martínez | 1.05 | 2009-2017 | |
| 13 | Rafael Diéguez# | 1.07 | 2025-2042 | |
| 14 | Ramón Torres# | 1.08 | 2029-2042 | |
| 15 | Roberto Serrano# | 1.10 | 2026-2041 | |
| 16 | David Hernández | 1.12 | 2008-2013 | |
| 17 | José Torres# | 1.17 | 2022-2042 | |
| 18 | Norm Hawk | 1.18 | 2007-2013 | |
| 19 | Sergio Pinzón# | 1.20 | 2029-2042 | |
| 19 | Pedro Ramírez | 1.20 | 2007-2011 | |
| 21 | Luis Robles# | 1.21 | 2030-2041 | |
| 22 | Ramón Villalobos# | 1.22 | 2028-2042 | |
| 22 | Raúl Pacheco | 1.22 | 2025-2038 | |
| 24 | Juan Flores# | 1.26 | 2025-2042 | |
| 25 | Juan Rodríguez# | 1.28 | 2024-2042 | |
| 26 | António Flores# | 1.29 | 2028-2042 | |
| 27 | Pedro Garza | 1.30 | 2025-2034 | |
| 27 | César Soto | 1.30 | 2015-2030 | |
| 29 | Manuel Muñóz# | 1.31 | 2027-2042 | |
| 30 | Santiago Benítez# | 1.32 | 2028-2042 | |
| 31 | Ricardo Encarnación# | 1.34 | 2039-2042 | |
| 32 | José Pérez# | 1.35 | 2028-2042 | |
| 33 | Carlos Flores# | 1.37 | 2030-2042 | |
| 33 | Martín Silva | 1.37 | 2025-2039 | |
| 35 | Pedro Reyes | 1.38 | 2025-2040 | |
| 35 | Jesús Mireles# | 1.38 | 2030-2042 | |
| 37 | Carlos Cosme# | 1.39 | 2029-2042 | |
| 38 | Ángel Rodríguez# | 1.46 | 2032-2042 | |
| 39 | Carlos Martínez# | 1.48 | 2033-2042 | |
| 40 | Sergio López | 1.51 | 2016-2026 | |
| 40 | Tony Alvarado# | 1.51 | 2037-2042 | |
| 42 | Manuel Arroyo | 1.55 | 2015-2036 | |
| 43 | Juan Cardenas | 1.63 | 2012-2030 | |
| 44 | Alejandro Soto# | 1.64 | 2037-2042 | |
| 45 | Mario Mendoza | 1.65 | 2007-2017 | |
| 46 | Armando Tapia | 1.92 | 2007-2012 | |
| 47 | Luis Ramos | 1.95 | 2011-2026 |
