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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Steve Nebraska* | 0.83 | 1973-1991 | |
| 2 | Heath Rockefeller* | 0.97 | 1985-1996 | |
| 3 | Johan Schmatzhagen* | 0.98 | 1973-1984 | |
| 4 | Shawn Huber* | 1.00 | 2031-2050 | |
| 4 | Mark Bobovnik* | 1.00 | 1979-1992 | |
| 6 | Nelson Ramírez* | 1.01 | 2020-2034 | |
| 7 | Roberto Ramírez | 1.02 | 2041-2056 | |
| 8 | Mike Swanson* | 1.03 | 2014-2026 | |
| 8 | Lorenzo de' Medici | 1.03 | 2037-2056 | |
| 8 | Todd Stone# | 1.03 | 2047-2062 | |
| 8 | Hayden Finch | 1.03 | 1985-1999 | |
| 12 | Keijo Reini | 1.05 | 2041-2053 | |
| 12 | Skip Glendenning* | 1.05 | 2016-2033 | |
| 14 | John Ross Riles, Jr.* | 1.06 | 1981-2002 | |
| 14 | Ángel Hernández | 1.06 | 2039-2055 | |
| 14 | Roy Hobbs, Jr.* | 1.06 | 1973-1982 | |
| 14 | Lionel Sanguinacco | 1.06 | 2010-2025 | |
| 14 | Frank Rogers | 1.06 | 1974-1988 | |
| 14 | Al Colbert | 1.06 | 2042-2054 | |
| 20 | Tiernan O'Macken | 1.07 | 2040-2058 | |
| 20 | Eric Stevens# | 1.07 | 2052-2062 | |
| 20 | Roy Anderson | 1.07 | 1976-1987 | |
| 20 | Ricardo Díaz* | 1.07 | 2019-2038 | |
| 20 | Corey Aubrey | 1.07 | 1974-1988 | |
| 20 | Arky Mooris | 1.07 | 1973-1981 | |
| 26 | Eric Beckmeyer | 1.08 | 1979-1992 | |
| 26 | Vernon Simpson* | 1.08 | 1973-1978 | |
| 26 | Jonathan Bowen | 1.08 | 2021-2035 | |
| 29 | James Browning | 1.09 | 2041-2053 | |
| 29 | Miguel Datiz | 1.09 | 2023-2034 | |
| 31 | Mark Everett | 1.10 | 1978-1995 | |
| 31 | Ken Howell* | 1.10 | 1984-2005 | |
| 31 | Jeff Rosenrosen | 1.10 | 1973-1979 | |
| 31 | Jerry Syed* | 1.10 | 1976-1990 | |
| 31 | Héctor Silva# | 1.10 | 2053-2062 | |
| 36 | Gow Cho | 1.11 | 2021-2031 | |
| 36 | Bob Sanderson | 1.11 | 2022-2037 | |
| 36 | Pedro Espín | 1.11 | 2010-2025 | |
| 36 | Joël Ottoboni | 1.11 | 2039-2053 | |
| 36 | Alaric Wullenweber | 1.11 | 2041-2062 | |
| 41 | Lank Bechard | 1.12 | 1973-1978 | |
| 41 | Carlos Valle* | 1.12 | 2035-2053 | |
| 41 | Ivan Aguilera | 1.12 | 1977-1988 | |
| 41 | Gabriel Campos* | 1.12 | 2012-2026 | |
| 41 | Brian Middleton | 1.12 | 2008-2022 | |
| 41 | Quirke Roddis# | 1.12 | 2045-2062 | |
| 41 | Luis Tiant IV | 1.12 | 2013-2026 | |
| 48 | Jim Brochtrup | 1.13 | 1995-2006 | |
| 48 | Bobby Carey | 1.13 | 1975-1985 | |
| 48 | Cristián García | 1.13 | 2041-2053 | |
| 48 | Rubén Vázquez | 1.13 | 2043-2061 | |
| 48 | Jayden Walker | 1.13 | 2013-2021 | |
| 48 | Jamaal Jumboni | 1.13 | 1973-1982 | |
| 48 | Adergazoz Ouakili | 1.13 | 2036-2051 | |
| 48 | Juan Cerda | 1.13 | 2041-2054 | |
| 48 | Jay Lee* | 1.13 | 1994-2009 | |
| 48 | Manuel Ramírez* | 1.13 | 2018-2035 | |
| 58 | Kurt Stallwith* | 1.14 | 1973-1984 | |
| 58 | Gilberto Sosa | 1.14 | 2041-2055 | |
| 58 | Julio Guillerma | 1.14 | 1973-1983 | |
| 58 | Bryan Canniff | 1.14 | 1973-1983 | |
| 58 | Marco Vitalle | 1.14 | 2039-2049 | |
| 58 | Santos Vazquez | 1.14 | 1988-1997 | |
| 58 | Brock Rutherford | 1.14 | 1973-1979 | |
| 58 | Shane Wookey | 1.14 | 1994-2009 | |
| 58 | Luis Manuel Rodríguez | 1.14 | 2043-2057 | |
| 58 | Greg Doonin | 1.14 | 1973-1977 | |
| 58 | Voo Fowler | 1.14 | 1973-1983 | |
| 58 | Jason Egan* | 1.14 | 1997-2017 | |
| 58 | Floyd Bannister | 1.14 | 1983-1996 | |
| 71 | Martin Román | 1.15 | 2043-2061 | |
| 71 | Christopher Stoller* | 1.15 | 1996-2011 | |
| 71 | Gary Estes* | 1.15 | 2017-2035 | |
| 71 | Manny Bautista* | 1.15 | 2017-2031 | |
| 71 | Chris Kelly | 1.15 | 2033-2046 | |
| 71 | Larry Gorton | 1.15 | 1973-1982 | |
| 71 | Miguel Ramos | 1.15 | 2034-2046 | |
| 71 | Bobby Lynch | 1.15 | 2033-2045 | |
| 71 | Juan López | 1.15 | 2020-2030 | |
| 71 | Bill Max* | 1.15 | 1975-1989 | |
| 71 | Todd Adams | 1.15 | 1975-1988 | |
| 71 | Allan Atkins | 1.15 | 1984-1998 | |
| 71 | Chip Foodie | 1.15 | 1989-2006 | |
| 71 | George Thrilkil | 1.15 | 1976-1993 | |
| 71 | Carlos Flores | 1.15 | 2043-2058 | |
| 86 | Ricardo Barrera | 1.16 | 1982-1995 | |
| 86 | Felix Pan | 1.16 | 1988-1999 | |
| 86 | Jeff Kiplinger* | 1.16 | 1991-2009 | |
| 86 | Lawrence Columbus LaLoosh* | 1.16 | 2026-2039 | |
| 86 | Francisco Salgado | 1.16 | 2041-2058 | |
| 86 | Lincoln Hoots | 1.16 | 1976-1992 | |
| 86 | Ignacio Rodríguez | 1.16 | 2022-2035 | |
| 86 | Juan Jose Ornelas | 1.16 | 2021-2035 | |
| 86 | Clyde Mercedes | 1.16 | 1982-1989 | |
| 86 | Rudy Ramirez | 1.16 | 1973-1980 | |
| 86 | Gilberto Cordero# | 1.16 | 2043-2062 | |
| 86 | Gil Daniels | 1.16 | 1983-1996 | |
| 86 | António Hernández# | 1.16 | 2048-2059 | |
| 86 | Matt Ryan | 1.16 | 1981-1993 | |
| 86 | Danya Tchekanov* | 1.16 | 2038-2053 |
