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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Alvin Pitts | 0.93 | 2025-2035 | |
| 2 | Lawrence Boulter | 1.03 | 2018-2031 | |
| 2 | Austin Upham | 1.03 | 2020-2027 | |
| 4 | Don Raynor | 1.05 | 2012-2017 | |
| 5 | Lúcio Olvera | 1.07 | 2017-2030 | |
| 6 | Joseph Grieco | 1.09 | 2051-2057 | |
| 7 | Tim Primmer | 1.10 | 2051-2057 | |
| 8 | Edgardo Mendoza | 1.12 | 2030-2043 | |
| 9 | Burl Delaney | 1.14 | 2045-2054 | |
| 10 | Kenny Collier | 1.16 | 2018-2024 | |
| 11 | Ippolito Ghezzi | 1.17 | 2047-2057 | |
| 12 | Walt Bruce | 1.19 | 2013-2017 | |
| 13 | Octávio Rodríguez | 1.20 | 2028-2044 | |
| 13 | Morgan Johnson | 1.20 | 2032-2038 | |
| 15 | Martin Reed | 1.21 | 2005-2011 | |
| 15 | Puck de Gast | 1.21 | 2046-2052 | |
| 17 | Ernie Eggins | 1.22 | 2033-2046 | |
| 17 | Pat Foster | 1.22 | 2007-2016 | |
| 17 | Konrad Bolt | 1.22 | 2051-2060 | |
| 20 | Ron Hunt | 1.24 | 2005-2012 | |
| 20 | Charles Tatum | 1.24 | 2033-2038 | |
| 22 | Bartolo Fernández | 1.25 | 2018-2023 | |
| 22 | Danny Veras | 1.25 | 2053-2060 | |
| 24 | Youp Boelens | 1.26 | 2052-2061 | |
| 24 | Bobby Makeever | 1.26 | 2047-2054 | |
| 26 | Salvador Rosas | 1.27 | 2022-2030 | |
| 27 | Bob Hines | 1.28 | 2038-2045 | |
| 27 | Nate Potter | 1.28 | 2003-2017 | |
| 27 | Anthony Henderson | 1.28 | 2006-2012 | |
| 27 | Ted Henry | 1.28 | 2038-2044 | |
| 27 | Bill Martin | 1.28 | 2037-2043 | |
| 32 | Ramón Martínez | 1.29 | 2048-2057 | |
| 32 | Joe Turner | 1.29 | 2016-2026 | |
| 32 | Cédrik Vézina | 1.29 | 2045-2051 | |
| 35 | Bob Gordon | 1.30 | 1990-1999 | |
| 35 | Paul Davis | 1.30 | 2043-2049 | |
| 35 | Felix Silva | 1.30 | 2062-2066 | |
| 35 | Monty Viadana# | 1.30 | 2057-2061 | |
| 35 | Feitze Spruijt | 1.30 | 2044-2051 | |
| 40 | Jesús Rodríguez | 1.31 | 1990-1994 | |
| 41 | Alan Hilton | 1.32 | 2007-2011 | |
| 41 | Finley Taylor | 1.32 | 2056-2063 | |
| 41 | Pedro Padilla | 1.32 | 2030-2038 | |
| 41 | Martin Murphy | 1.32 | 1990-1994 | |
| 41 | José Reyna | 1.32 | 2043-2049 | |
| 46 | Iván Rojas | 1.33 | 2020-2026 | |
| 46 | Jorge Trujillo | 1.33 | 2011-2016 | |
| 46 | Paddy Sier | 1.33 | 2043-2051 | |
| 46 | Herb Warner | 1.33 | 2038-2044 | |
| 46 | Don Flowers | 1.33 | 2040-2049 | |
| 51 | Paul Pushak | 1.34 | 2046-2053 | |
| 51 | Kyle Hargrove | 1.34 | 2034-2040 | |
| 53 | Jorge Cabrera | 1.35 | 2004-2010 | |
| 53 | Alejandro Fuentes | 1.35 | 2034-2040 | |
| 53 | Da-xia Lung | 1.35 | 2047-2053 | |
| 53 | Stanley Hodges | 1.35 | 1992-2000 | |
| 53 | Bob Riley | 1.35 | 2006-2017 | |
| 53 | Rusty Goodwin | 1.35 | 2031-2040 | |
| 59 | Jeffery Shirley | 1.36 | 2037-2043 | |
| 59 | Charles Meyer | 1.36 | 2032-2042 | |
| 59 | Quincy Anderson | 1.36 | 2035-2041 | |
| 59 | Pedro Villalobos | 1.36 | 2031-2038 | |
| 59 | Chris Bolden | 1.36 | 2003-2011 | |
| 64 | Fernando López | 1.37 | 2005-2011 | |
| 64 | Carl Allan | 1.37 | 2038-2048 | |
| 64 | Rafael González | 1.37 | 2047-2052 | |
| 67 | James Martin | 1.38 | 2011-2018 | |
| 67 | Vicente Peña | 1.38 | 1990-2000 | |
| 67 | Damon Davis | 1.38 | 2018-2029 | |
| 67 | Raymond Champagne | 1.38 | 2032-2038 | |
| 71 | Sergio Montoya | 1.39 | 2033-2041 | |
| 71 | Yuri D'Urso | 1.39 | 2040-2047 | |
| 71 | Matt Wheat | 1.39 | 2032-2036 | |
| 71 | Mike Whitaker | 1.39 | 1990-1997 | |
| 71 | Dominic Boutin | 1.39 | 2032-2041 | |
| 71 | Robert Tardif | 1.39 | 2029-2035 | |
| 77 | George Gilmore | 1.40 | 1990-1998 | |
| 78 | Johnny Stephens | 1.41 | 2029-2034 | |
| 78 | Rodrigo Montoya | 1.41 | 2034-2040 | |
| 80 | Ángel Correa | 1.42 | 2050-2063 | |
| 80 | Tomás Guerra | 1.42 | 2033-2039 | |
| 80 | Kento Takahashi | 1.42 | 2052-2063 | |
| 80 | Salvador De Jesús | 1.42 | 2039-2047 | |
| 80 | Jerry Clark | 1.42 | 2028-2033 | |
| 85 | Ray Williamson | 1.43 | 2028-2034 | |
| 86 | Jorge Carrillo | 1.44 | 2031-2038 | |
| 86 | Francis Marriott | 1.44 | 2060-2066 | |
| 86 | Samuel Giroux | 1.44 | 2003-2010 | |
| 89 | Jesus Ayala | 1.45 | 2053-2061 | |
| 89 | Martin White | 1.45 | 1990-1994 | |
| 89 | Francisco Vásquez | 1.45 | 2043-2050 | |
| 89 | Vincent Wilson | 1.45 | 1991-1998 | |
| 93 | Mario Pereira | 1.49 | 2039-2044 | |
| 94 | Darrell Lorton | 1.51 | 2033-2038 | |
| 95 | Robbie Dunn | 1.57 | 2032-2038 | |
| 96 | Harry Camp | 1.59 | 1996-2007 | |
| 97 | John Jordan | 1.60 | 2024-2034 | |
| 97 | Davey Shannon | 1.60 | 1991-1996 |
