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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | António López | 0.56 | 2010 | |
| 2 | Armand Calazzo | 0.58 | 2020 | |
| 3 | Tommy Smith | 0.59 | 2007 | |
| 4 | Luis Cortéz | 0.60 | 2018 | |
| 4 | Terry Klassen | 0.60 | 2018 | |
| 4 | Javier Rodríguez | 0.60 | 2007 | |
| 7 | António Alvarado | 0.61 | 2012 | |
| 8 | Manny Campos | 0.62 | 2027 | |
| 8 | Melvin Brooks# | 0.62 | 2036 | |
| 10 | Josh Ewing | 0.63 | 2028 | |
| 10 | Jerry Martin | 0.63 | 2024 | |
| 12 | Ramiro Piña | 0.64 | 2020 | |
| 13 | Augusto Salazar# | 0.65 | 2043 | |
| 13 | Jaime Espinoza | 0.65 | 2021 | |
| 15 | Arthur Green | 0.66 | 2020 | |
| 16 | Stephen Warner# | 0.68 | 2041 | |
| 16 | Júlio Rosa | 0.68 | 2011 | |
| 18 | Jason Drake | 0.69 | 2018 | |
| 19 | Tommy Connare | 0.70 | 2008 | |
| 19 | Jonathan Booker | 0.70 | 2014 | |
| 19 | Martín Lópes | 0.70 | 2010 | |
| 22 | Mark Anderson | 0.71 | 2023 | |
| 22 | Albert Soto# | 0.71 | 2047 | |
| 24 | Miguel Ramírez | 0.72 | 2012 | |
| 24 | Jesse Little | 0.72 | 2018 | |
| 26 | Tim Sanders | 0.73 | 2028 | |
| 26 | Oscar Wheeler | 0.73 | 2015 | |
| 26 | Alberto Márquez | 0.73 | 2019 | |
| 26 | Jaime Espinoza | 0.73 | 2020 | |
| 26 | José Navarro | 0.73 | 2014 | |
| 26 | Oscar Wheeler | 0.73 | 2016 | |
| 26 | Paul Lorenzo | 0.73 | 2025 | |
| 33 | Willie St. John | 0.74 | 2020 | |
| 33 | Dave Menke# | 0.74 | 2045 | |
| 33 | Manny Sandoval | 0.74 | 2018 | |
| 33 | Tim Harmon | 0.74 | 2011 | |
| 37 | Mark Manning | 0.75 | 2030 | |
| 37 | Scott Davis | 0.75 | 2026 | |
| 37 | Andrew Caine | 0.75 | 2024 | |
| 37 | James Horton# | 0.75 | 2045 | |
| 37 | Jesús Hernández | 0.75 | 2007 | |
| 37 | Armando Pérez | 0.75 | 2015 | |
| 37 | Francisco Pérez | 0.75 | 2018 | |
| 37 | Jesse Green | 0.75 | 2014 | |
| 37 | Scott Davis | 0.75 | 2025 | |
| 46 | António Alvarado | 0.76 | 2014 | |
| 46 | Chris Chamberlain | 0.76 | 2025 | |
| 46 | Todd Howell | 0.76 | 2016 | |
| 46 | Ben Williams# | 0.76 | 2037 | |
| 46 | Jerry Burgess | 0.76 | 2007 | |
| 46 | Tom England# | 0.76 | 2037 | |
| 46 | Carlos Pacheco | 0.76 | 2022 | |
| 53 | José Martínez* | 0.77 | 2020 | |
| 53 | Dwight Livingston | 0.77 | 2023 | |
| 53 | Matt Graves# | 0.77 | 2043 | |
| 53 | José Rojas | 0.77 | 2014 | |
| 53 | Ray Reyes | 0.77 | 2028 | |
| 58 | Diego Chávez | 0.78 | 2013 | |
| 58 | Eric Sullivan# | 0.78 | 2045 | |
| 58 | Jorge Vásquez | 0.78 | 2007 | |
| 58 | Bill Cunningham# | 0.78 | 2046 | |
| 58 | Rod Bowen# | 0.78 | 2043 | |
| 63 | Carlos Pacheco | 0.79 | 2021 | |
| 63 | José Caraballo | 0.79 | 2008 | |
| 63 | Martín Lópes | 0.79 | 2011 | |
| 63 | António Sánchez | 0.79 | 2018 | |
| 63 | Daniel Grant | 0.79 | 2019 | |
| 63 | Diego Chávez | 0.79 | 2011 | |
| 63 | Artie Hatch | 0.79 | 2031 | |
| 63 | Boboy Ambay | 0.79 | 2013 | |
| 63 | Beau Brown | 0.79 | 2017 | |
| 72 | David Hill | 0.80 | 2019 | |
| 72 | Brent Miller | 0.80 | 2018 | |
| 72 | Joe Matthews | 0.80 | 2011 | |
| 72 | Carlos Tavárez | 0.80 | 2020 | |
| 72 | Matt Parker | 0.80 | 2022 | |
| 72 | Norman White | 0.80 | 2016 | |
| 72 | Ray Reyes | 0.80 | 2030 | |
| 72 | Ben Moody | 0.80 | 2019 | |
| 72 | Alfonso Gutiérrez | 0.80 | 2010 | |
| 72 | Ken Sampson# | 0.80 | 2048 | |
| 72 | Edward Baker | 0.80 | 2020 | |
| 72 | Dave Smith | 0.80 | 2020 | |
| 72 | Chuck Sepúlveda | 0.80 | 2029 | |
| 72 | Ross Holley | 0.80 | 2010 | |
| 72 | Juan Espinosa | 0.80 | 2023 | |
| 72 | Jorge Ruíz | 0.80 | 2020 | |
| 88 | José Valdéz | 0.81 | 2017 | |
| 88 | Todd Brewster | 0.81 | 2024 | |
| 88 | Elmer Bolick# | 0.81 | 2046 | |
| 88 | Terry Klassen | 0.81 | 2016 | |
| 88 | Darrell von Klingenberg# | 0.81 | 2046 | |
| 88 | Beau Brown | 0.81 | 2016 | |
| 88 | Mark Head | 0.81 | 2016 | |
| 88 | José Martínez* | 0.81 | 2019 | |
| 88 | George Moore | 0.81 | 2023 | |
| 88 | Ben Johnston | 0.81 | 2028 | |
| 88 | Paul Lorenzo | 0.81 | 2027 | |
| 88 | Tom Miller | 0.81 | 2019 | |
| 100 | Ron Burrell | 0.82 | 2035 |
