| Career - Worst WHIP | |||
| Rk | Player Name | Totals | |
| 1 | Terry Adams | 1.66 | |
| 2 | Clayton Richard | 1.60 | |
| 3 | John Maine | 1.57 | |
| 4 | A.J. Burnett | 1.55 | |
| 5 | Rheal Cormier | 1.44 | |
| 6 | Erik Hanson | 1.44 | |
| 7 | John Thomson | 1.44 | |
| 8 | Brett Anderson | 1.43 | |
| 9 | Johnny Cueto | 1.43 | |
| 10 | Alex Fernandez | 1.42 | |
| 11 | Ken Hill | 1.42 | |
| 12 | Mark Redman | 1.41 | |
| 13 | Steven Matz | 1.40 | |
| 14 | Denny Neagle | 1.38 | |
| 15 | Brandon Webb | 1.37 | |
| 16 | Dan Straily | 1.37 | |
| 17 | Curt Schilling | 1.35 | |
| 18 | Joe Saunders | 1.35 | |
| 19 | Roger Clemens | 1.33 | |
| 20 | Cole Hamels | 1.33 | |
| 21 | Bronson Arroyo | 1.32 | |
| 22 | Kevin Brown | 1.31 | |
| 23 | NOLAN RYAN | 1.29 | |
| 24 | Chris Bosio | 1.28 | |
| 25 | Wilson Alvarez | 1.27 | |
| Single Season - Worst WHIP | |||||
| Rk | Player Name | Totals | Year | ||
| 1 | Mike Morgan | 1.99 | 1994 | ||
| 2 | Tom Glavine | 1.91 | 2000 | ||
| 3 | Danny Jackson | 1.83 | 1990 | ||
| 4 | Terry Adams | 1.79 | 2003 | ||
| 5 | Clayton Richard | 1.79 | 2011 | ||
| 6 | Bud Norris | 1.76 | 2014 | ||
| 7 | Rheal Cormier | 1.71 | 1994 | ||
| 8 | Ramon Ortiz | 1.70 | 2002 | ||
| 9 | Terry Adams | 1.69 | 2002 | ||
| 10 | A.J. Burnett | 1.69 | 2015 | ||
| 11 | Cole Hamels | 1.69 | 2017 | ||
| 12 | Kwang Hyun Kim | 1.66 | 2022 | ||
| 13 | Steve Woodard | 1.65 | 2000 | ||
| 14 | Jeff Niemann | 1.65 | 2010 | ||
| 15 | Adam Wainwright | 1.65 | 2020 | ||
| 16 | Jon Garland | 1.64 | 2003 | ||
| 17 | Mike Hampton | 1.63 | 2004 | ||
| 18 | Shane Reynolds | 1.62 | 2002 | ||
| 19 | Joe Saunders | 1.61 | 2010 | ||
| 20 | Mike Hampton | 1.60 | 2005 | ||
| 21 | Kyle Freeland | 1.60 | 2018 | ||
| 22 | Livan Hernandez | 1.59 | 2011 | ||
| 23 | Erik Hanson | 1.57 | 1990 | ||
| 24 | Brandon Webb | 1.57 | 2005 | ||
| 25 | Bruce Chen | 1.57 | 2012 | ||