According to NFL Insider Ian Rapoport, Carolina Panthers quarterback Cam Newton is still in a walking boot today as he continues to deal with a re-aggravation of his foot injury. 

The team is expected to know more about his status soon. Rapoport says if Newton can practise, he has a shot at playing on Sunday against the Arizona Cardinals but if he doesn't, it's unlikely he plays. 

Newton, 30, originally sprained his left foot in Carolina's third preseason game against the Patriots but returned in time for the regular season opener. 

He has yet to throw a touchdown pass this season with one interception and ranks 31st in the NFL in passer efficiency rating (71) among qualifying QBs and has completed just 56 per cent of his passes for 572 yards. 

The Panthers are currently 0-2 to start the season, losing to the Los Angeles Rams and Tampa Bay Buccaneers at home to start the season.