| Career - Worst WHIP | |||
| Rk | Player Name | Totals | |
| 1 | Mike Hampton | 1.62 | |
| 2 | Aaron Sele | 1.62 | |
| 3 | Randy Wolf | 1.59 | |
| 4 | Chan Ho Park | 1.55 | |
| 5 | Aaron Cook | 1.55 | |
| 6 | Frank Viola | 1.55 | |
| 7 | Brett Myers | 1.54 | |
| 8 | Martin Perez | 1.54 | |
| 9 | Blake Snell | 1.54 | |
| 10 | Jason Marquis | 1.53 | |
| 11 | Ramon Martinez | 1.52 | |
| 12 | Al Leiter | 1.52 | |
| 13 | Chuck Finley | 1.52 | |
| 14 | Scott Kazmir | 1.52 | |
| 15 | Mark Langston | 1.52 | |
| 16 | Kenny Rogers | 1.52 | |
| 17 | Darryl Kile | 1.51 | |
| 18 | Jason Schmidt | 1.51 | |
| 19 | Edwin Jackson | 1.51 | |
| 20 | John Burkett | 1.50 | |
| 21 | Ryan Dempster | 1.50 | |
| 22 | Todd Stottlemyre | 1.50 | |
| 23 | Yovani Gallardo | 1.50 | |
| 24 | Gio Gonzalez | 1.50 | |
| 25 | Wade Miley | 1.50 | |
| Single Season - Worst WHIP | |||||
| Rk | Player Name | Totals | Year | ||
| 1 | Ben Rivera | 2.18 | 1994 | ||
| 2 | Frank Viola | 2.10 | 1994 | ||
| 3 | Donovan Osborne | 2.04 | 1994 | ||
| 4 | Wilson Alvarez | 2.02 | 1994 | ||
| 5 | Jose Mesa | 2.02 | 1994 | ||
| 6 | Kevin Gross | 2.01 | 1994 | ||
| 7 | Trevor Wilson | 2.00 | 1994 | ||
| 8 | Mike Morgan | 1.99 | 1994 | ||
| 9 | Randy Wolf | 1.99 | 2001 | ||
| 10 | Jim Abbott | 1.98 | 1997 | ||
| 11 | Al Leiter | 1.98 | 2000 | ||
| 12 | Jim Deshaies | 1.96 | 1991 | ||
| 13 | Randy Johnson | 1.94 | 1990 | ||
| 14 | Chris Nabholz | 1.93 | 1994 | ||
| 15 | Joey Hamilton | 1.93 | 1999 | ||
| 16 | Roger Pavlik | 1.92 | 1994 | ||
| 17 | Osvaldo Fernandez | 1.91 | 1997 | ||
| 18 | Tom Glavine | 1.91 | 2000 | ||
| 19 | C.C. Sabathia | 1.91 | 2015 | ||
| 20 | Dave Stewart | 1.90 | 1994 | ||
| 21 | Tom Glavine | 1.89 | 1991 | ||
| 22 | Mark Langston | 1.89 | 1991 | ||
| 23 | Fernando Valenzuela | 1.89 | 1990 | ||
| 24 | Chad Billingsley | 1.89 | 2009 | ||
| 25 | CC Sabathia | 1.89 | 2018 | ||