Lindsay H. Jones

USA TODAY Sports

ENGLEWOOD, Colo. — The Denver Broncos lost five defensive starters to season-ending injuries or illness during their Super Bowl run last season. All but one of them has been cleared to practice when the team begins training camp on Thursday.

Outside linebacker Von Miller (ACL), defensive tackle Kevin Vickerson (hip), safety Rahim Moore (lower leg) and defensive end Derek Wolfe (neck/illness) have been cleared to practice, though coach John Fox said some of those players will be limited as camp begins.

Miller, injured in the second-to-last regular season game, had surgery in January. He was able to do individual drills during voluntary practices and the minicamp last month. His workload should steadily increase as camp progresses. Fox, however, said the Broncos would be cautious.

Only cornerback Chris Harris, who suffered his torn ACL in a divisional round playoff win against San Diego in January, will start camp on the physically unable to perform list.

"He's on schedule," head coach John Fox said of Harris. "I'm not sure I've ever seen a guy work that hard to rehab. … It's grueling."