| Career - Worst On-Base | |||
| Rk | Player Name | Totals | |
| 1 | Edmundo Sosa | 0.255 | |
| 2 | Gary Sanchez | 0.265 | |
| 3 | J.T. Realmuto | 0.276 | |
| 4 | Adolis Garcia | 0.278 | |
| 5 | Wilton Guerrero | 0.282 | |
| 6 | Ivan Rodriguez | 0.284 | |
| 7 | Bill Spiers | 0.285 | |
| 8 | Leody Taveras | 0.289 | |
| 9 | Glenn Braggs | 0.296 | |
| 10 | Andre Dawson | 0.296 | |
| 11 | Bengie Molina | 0.298 | |
| 12 | Don Slaught | 0.301 | |
| 13 | George Springer | 0.302 | |
| 14 | Bret Boone | 0.304 | |
| 15 | Erick Aybar | 0.306 | |
| 16 | Mike Bordick | 0.309 | |
| 17 | Torii Hunter | 0.310 | |
| 18 | Ronnie Belliard | 0.310 | |
| 19 | Adam Frazier | 0.310 | |
| 20 | Mark Grudzielanek | 0.314 | |
| 21 | Kendrys Morales | 0.314 | |
| 22 | Christian Walker | 0.314 | |
| 23 | Carl Crawford | 0.315 | |
| 24 | Deion Sanders | 0.315 | |
| 25 | Mark Kotsay | 0.315 | |
| Single Season - Worst On-Base | |||||
| Rk | Player Name | Totals | Year | ||
| 1 | Gary Sheffield | 0.176 | 1993 | ||
| 2 | Fred McGriff | 0.210 | 1993 | ||
| 3 | Corey Seager | 0.235 | 2023 | ||
| 4 | Adam Duvall | 0.246 | 2017 | ||
| 5 | Andre Dawson | 0.252 | 1992 | ||
| 6 | Bret Boone | 0.255 | 1997 | ||
| 7 | George Springer | 0.256 | 2015 | ||
| 8 | Edmundo Sosa | 0.256 | 2025 | ||
| 9 | J.T. Realmuto | 0.257 | 2024 | ||
| 10 | Torii Hunter | 0.258 | 2002 | ||
| 11 | Michael Cuddyer | 0.261 | 2013 | ||
| 12 | Reed Johnson | 0.261 | 2013 | ||
| 13 | Bill Spiers | 0.267 | 1992 | ||
| 14 | Bill Spiers | 0.269 | 1991 | ||
| 15 | Adolis Garcia | 0.269 | 2022 | ||
| 16 | Adolis Garcia | 0.271 | 2023 | ||
| 17 | Dave Henderson | 0.275 | 1990 | ||
| 18 | Bengie Molina | 0.275 | 2009 | ||
| 19 | Wilton Guerrero | 0.276 | 1998 | ||
| 20 | Adam Frazier | 0.277 | 2021 | ||
| 21 | A.J. Pierzynski | 0.278 | 2010 | ||
| 22 | Mike Devereaux | 0.279 | 1992 | ||
| 23 | Mallex Smith | 0.279 | 2020 | ||
| 24 | Eddie Rosario | 0.281 | 2020 | ||
| 25 | Bret Boone | 0.283 | 1996 | ||