Packers' John Williams: Practice window opened

Williams (back) had his 21-day practice window opened by the Packers on Wednesday, Zach Kruse of Packers Wire reports.

Williams has been sidelined since training camp while nursing a back injury, spending the entirety of the season to this point on the reserve/PUP list. The offensive lineman will have to be added to the active roster in the next 21 days, or he'll remain sidelined for the rest of the year.