| Career - Worst WHIP | |||
| Rk | Player Name | Totals | |
| 1 | Aaron Sele | 1.63 | |
| 2 | Mike Hampton | 1.61 | |
| 3 | Wade Miley | 1.60 | |
| 4 | Dave Burba | 1.54 | |
| 5 | Ryan Dempster | 1.46 | |
| 6 | Cory Lidle | 1.44 | |
| 7 | Bartolo Colon | 1.42 | |
| 8 | Trevor Bauer | 1.40 | |
| 9 | Justin Masterson | 1.38 | |
| 10 | Danny Salazar | 1.37 | |
| 11 | Rick Porcello | 1.32 | |
| 12 | Curt Schilling | 1.31 | |
| 13 | Carlos Carrasco | 1.30 | |
| 14 | Mike Clevinger | 1.30 | |
| 15 | Kevin Millwood | 1.27 | |
| 16 | Phil Hughes | 1.17 | |
| Single Season - Worst WHIP | |||||
| Rk | Player Name | Totals | Year | ||
| 1 | Jim Abbott | 1.98 | 1997 | ||
| 2 | Charlie Leibrandt | 1.85 | 1994 | ||
| 3 | Greg Hibbard | 1.81 | 1994 | ||
| 4 | Rocky Coppinger | 1.72 | 1997 | ||
| 5 | Aaron Sele | 1.71 | 1999 | ||
| 6 | Jon Niese | 1.71 | 2016 | ||
| 7 | Aaron Civale | 1.71 | 2021 | ||
| 8 | Shelby Miller | 1.65 | 2016 | ||
| 9 | Mike Hampton | 1.64 | 1998 | ||
| 10 | Danys Baez | 1.63 | 2003 | ||
| 11 | Wade Miley | 1.63 | 2014 | ||
| 12 | Jacob Turner | 1.62 | 2014 | ||
| 13 | Wade Miley | 1.62 | 2022 | ||
| 14 | Aaron Sele | 1.55 | 2000 | ||
| 15 | Graham Ashcraft | 1.55 | 2024 | ||
| 16 | Bartolo Colon | 1.53 | 2002 | ||
| 17 | Mark Buehrle | 1.53 | 2012 | ||
| 18 | Russ Ortiz | 1.52 | 2002 | ||
| 19 | Danny Salazar | 1.50 | 2017 | ||
| 20 | Curt Schilling | 1.49 | 1994 | ||
| 21 | Kevin Tapani | 1.49 | 1994 | ||
| 22 | Brett Myers | 1.49 | 2009 | ||
| 23 | Ramiro Mendoza | 1.48 | 2000 | ||
| 24 | Trevor Bauer | 1.48 | 2020 | ||
| 25 | Dave Burba | 1.47 | 1999 | ||