The team released him earlier this season, but he cleared waivers and reverted to the team’s injured reserve list.
Williams’ has had a tumultuous year since joining the Bills via trade this offseason. Unhappy with his opportunity, he reportedly asked for a trade and the organization allowed him to pursue interested team. For the record, Williams denied at the time that he asked for a trade.
Williams is now free to sign with any team, granted someone would want him for the final week of the season. It is unlikely that any playoff team would be so desperate for receiver help that they would sign him for a postseason run. Teams already eliminated from playoff contention would also have little to gain from bringing him in, with no previous knowledge of the offense and an unlikelihood of getting on the field with one week left in the season.
It would be more likely that if he were given an opportunity to continue his career, it would happen in free agency this offseason.