Panthers' quarterback Vinny Testaverde missed practice Wednesday, leaving David Carr the front-runner to start Sunday at Tennessee. The 43-year-old Testaverde aggravated a right Achilles tendon injury in the first half of Carolina's loss to Indianapolis. He sat out the second half and has been receiving extensive treatment the past three days. Testaverde was seen riding to and from the practice field Wednesday in a golf cart. Carr, who missed the Panthers' win over Arizona, replaced Testaverde despite still recovering from compression fractures in his lower back. Saying he was only at 80 percent, Carr threw for 103 yards, but the Panthers were outscored 21-0 in the second half of the 31-7 loss. "He was well enough to play last week. There aren't a lot of players out there that are 100 percent at this stage of the season," coach John Fox said. "He looked sharp in practice today. He had a good day of preparation both in the classroom and out on the field."