David Carr will play if he's healthy. He just may not start. That was the message from Panthers coach John Fox on Wednesday about the budding quarterback controversy involving Carr and 43-year-old Vinny Testaverde. Carr practiced without limitations on Wednesday. His sore back has improved since he missed Carolina's last game at Arizona on Oct. 14, when Testaverde led the Panthers to a win four days after signing with the team.