The Panthers released Williams (shoulder) on Wednesday, Adam Caplan of SiriusXM Radio reports.
After suiting up in all 16 games for Carolina in 2015, Williams had been a non-factor for the team the past two seasons, appearing in just three contests while spending all of 2017 on injured reserve. It's unsure what the future holds for the 29-year-old, who is unlikely to generate much interest on the open market after dealing with a litany of health issues the last two years.