| Career - Worst WHIP | |||
| Rk | Player Name | Totals | |
| 1 | Chan Ho Park | 1.57 | |
| 2 | Trevor Wilson | 1.56 | |
| 3 | Al Leiter | 1.55 | |
| 4 | Scott Erickson | 1.50 | |
| 5 | Francisco Liriano | 1.48 | |
| 6 | Ramon Martinez | 1.47 | |
| 7 | Matt Morris | 1.46 | |
| 8 | Jim Abbott | 1.42 | |
| 9 | Jorge De La Rosa | 1.41 | |
| 10 | Tom Milone | 1.41 | |
| 11 | JOSE RIJO | 1.40 | |
| 12 | Tom Glavine | 1.39 | |
| 13 | Pete Schourek | 1.39 | |
| 14 | Ubaldo Jimenez | 1.37 | |
| 15 | Andy Pettitte | 1.35 | |
| 16 | Mark Prior | 1.33 | |
| 17 | Cole Hamels | 1.33 | |
| 18 | Antonio Senzatela | 1.33 | |
| 19 | Joe Musgrove | 1.31 | |
| 20 | Matt Cain | 1.30 | |
| 21 | Max Fried | 1.30 | |
| 22 | Chris Bassitt | 1.29 | |
| 23 | Henderson Alvarez | 1.26 | |
| 24 | Mark Buehrle | 1.25 | |
| 25 | Mike Minor | 1.25 | |
| Single Season - Worst WHIP | |||||
| Rk | Player Name | Totals | Year | ||
| 1 | Trevor Wilson | 2.00 | 1994 | ||
| 2 | Al Leiter | 1.98 | 2000 | ||
| 3 | Clayton Richard | 1.76 | 2017 | ||
| 4 | Pete Schourek | 1.75 | 1997 | ||
| 5 | Cole Hamels | 1.71 | 2007 | ||
| 6 | Jeff Ballard | 1.70 | 1990 | ||
| 7 | Mike Sirotka | 1.70 | 2000 | ||
| 8 | Greg Hibbard | 1.69 | 1991 | ||
| 9 | Al Leiter | 1.66 | 2002 | ||
| 10 | Matt Morris | 1.65 | 2007 | ||
| 11 | Mike Hampton | 1.63 | 2001 | ||
| 12 | JOSE RIJO | 1.63 | 1990 | ||
| 13 | Ron Darling | 1.62 | 1990 | ||
| 14 | Chan Ho Park | 1.62 | 1999 | ||
| 15 | Angel Miranda | 1.60 | 1994 | ||
| 16 | Ramon Martinez | 1.60 | 1999 | ||
| 17 | Miguel Batista | 1.58 | 2004 | ||
| 18 | Scott Erickson | 1.58 | 1997 | ||
| 19 | Matt Morris | 1.58 | 2005 | ||
| 20 | JOSE RIJO | 1.58 | 1995 | ||
| 21 | Mark Prior | 1.57 | 2005 | ||
| 22 | Micah Owings | 1.57 | 2009 | ||
| 23 | Miguel Batista | 1.55 | 2005 | ||
| 24 | Brent Suter | 1.55 | 2018 | ||
| 25 | Jon Garland | 1.54 | 2011 | ||