PHILADELPHIA (AP) — Donovan McNabb could miss as much as a year or could be ready for the 2007 season opener after having surgery Tuesday to repair a torn knee ligament.

McNabb, a five-time Pro Bowl quarterback, tore the anterior cruciate ligament in his right knee in the second quarter of the Eagles' loss to Tennessee last week. It was his third season-ending injury in mid-November in the last five years.

Renowned orthopedist Dr. James Andrews performed the reconstructive knee surgery in Birmingham, Ala. Head athletic trainer Rick Burkholder said McNabb also needed expected repairs to his meniscus. He added there was a "good" chance McNabb will be healthy for Philadelphia's season opener, which would be about nine months.

"Donovan, with all his injuries, he works hard and expedites it," Burkholder said.