49ers nickel cornerback K’Waun Williams is expected to miss four to six weeks with the high ankle sprain that he suffered in the team’s loss to the Packers on November 5, as Nick Wagoner of ESPN.com reports (via Twitter). Williams played just four snaps before going down with the injury.

It’s especially unfortunate timing for Williams, who had just been activated off short-term injured reserve at the end of October. And, since he has already been on injured reserve this year, his season will be over if he goes back on IR. So the team will wait to see if there is a chance he can return before making that decision.