The Panthers placed Walker (undisclosed) on the reserve/COVID-19 list Wednesday, Darin Gantt of the Panthers' official site reports.
Walker was a healthy scratch for Sunday's game against the Buccaneers, and he'll now be forced to isolate from the team. It's not yet clear whether he's tested positive for COVID-19, but he isn't guaranteed to suit up in Week 17 even if he's activated prior to Sunday.