| Career - Worst WHIP | |||
| Rk | Player Name | Totals | |
| 1 | Shawn Estes | 1.93 | |
| 2 | Chris Nabholz | 1.56 | |
| 3 | Bud Black | 1.54 | |
| 4 | Bartolo Colon | 1.51 | |
| 5 | Brian Moehler | 1.46 | |
| 6 | Kelvim Escobar | 1.44 | |
| 7 | Scott Sanders | 1.43 | |
| 8 | Tommy Hanson | 1.43 | |
| 9 | Kris Benson | 1.41 | |
| 10 | Tom Candiotti | 1.40 | |
| 11 | Mike Leake | 1.40 | |
| 12 | Jack McDowell | 1.39 | |
| 13 | Shane Bieber | 1.39 | |
| 14 | Matt Boyd | 1.38 | |
| 15 | James Shields | 1.37 | |
| 16 | Kevin Millwood | 1.34 | |
| 17 | Brad Radke | 1.28 | |
| 18 | Pablo Lopez | 1.26 | |
| 19 | Diego Castillo | 1.25 | |
| 20 | Randy Tomlin | 1.23 | |
| 21 | Clayton Kershaw | 1.22 | |
| 22 | Michael Wacha | 1.21 | |
| 23 | Drew Rasmussen | 1.15 | |
| 24 | Tanner Roark | 1.13 | |
| 25 | Mariano Rivera | 1.02 | |
| Single Season - Worst WHIP | |||||
| Rk | Player Name | Totals | Year | ||
| 1 | Chris Nabholz | 1.93 | 1994 | ||
| 2 | Mike Leake | 1.76 | 2017 | ||
| 3 | Shawn Estes | 1.71 | 2002 | ||
| 4 | Aaron Sele | 1.68 | 1994 | ||
| 5 | Tony Armas | 1.67 | 2002 | ||
| 6 | Jack McDowell | 1.67 | 1994 | ||
| 7 | Jack McDowell | 1.67 | 1996 | ||
| 8 | Jaret Wright | 1.65 | 1999 | ||
| 9 | Jonathon Niese | 1.63 | 2013 | ||
| 10 | Brian Moehler | 1.61 | 2000 | ||
| 11 | Scott Sanders | 1.60 | 1995 | ||
| 12 | Scott Kazmir | 1.60 | 2006 | ||
| 13 | Andre Pallante | 1.57 | 2023 | ||
| 14 | Shane Bieber | 1.57 | 2024 | ||
| 15 | Tom Candiotti | 1.56 | 1994 | ||
| 16 | Zach Thompson | 1.56 | 2022 | ||
| 17 | Bud Black | 1.55 | 1990 | ||
| 18 | Tom Candiotti | 1.54 | 1991 | ||
| 19 | Shane Bieber | 1.54 | 2022 | ||
| 20 | Bud Black | 1.52 | 1991 | ||
| 21 | Doug Fister | 1.52 | 2018 | ||
| 22 | Jack McDowell | 1.51 | 1991 | ||
| 23 | Matt Boyd | 1.51 | 2017 | ||
| 24 | Chad Kuhl | 1.51 | 2017 | ||
| 25 | Kris Benson | 1.50 | 2005 | ||