The Broncos practiced without starting safeties Darian Stewart and T.J. Ward for a second straight day Friday.
Stewart has a sprained MCL but has vowed that he will be ready to go for the Super Bowl on Feb 7. Ward aggravated an ankle injury in the AFC Championship Game.
The Broncos will practice again Saturday before flying to the Bay Area on Sunday.
The Panthers are listing seven players as questionable, including starters Thomas Davis, Ryan Kalil, Kawann Short, Jonathan Stewart and Charles Johnson.