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|
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Sherwood Aguilar | 0.89 | 1993-1997 | |
| 2 | Júlio López | 0.94 | 2005-2012 | |
| 3 | Dan Neal# | 1.00 | 2008-2014 | |
| 4 | John Spens | 1.07 | 1973-1979 | |
| 5 | Santiago Cruz | 1.11 | 1971-1976 | |
| 6 | Jorge Encarnación | 1.13 | 1968-1974 | |
| 6 | Stu Ellis | 1.13 | 1972-1976 | |
| 8 | Kazuhiro Ono | 1.16 | 1968-1981 | |
| 9 | Gerald May# | 1.18 | 2008-2014 | |
| 9 | Francisco Silva# | 1.18 | 2007-2012 | |
| 9 | Michael Stroud# | 1.18 | 2005-2013 | |
| 12 | Darren Smith# | 1.20 | 2006-2012 | |
| 13 | Emílio Vásquez | 1.27 | 1961-1965 | |
| 14 | Pedro Fernández# | 1.31 | 2009-2014 | |
| 14 | Sidney Anderson# | 1.31 | 2008-2014 | |
| 16 | David Lamparello# | 1.36 | 2007-2014 | |
| 17 | Peter Simpson# | 1.38 | 2008-2014 | |
| 18 | Stephen Jones# | 1.42 | 2009-2014 | |
| 18 | Frank Warren# | 1.42 | 2008-2014 |
