Terrell Owens has undergone surgery to repair a torn anterior cruciate ligament in one of his knees following a previously undisclosed injury this offseason, according to sources. Owens was unavailable for comment, but sources said the surgery by noted orthopedist Dr. James Andrews occurred within the past month. According to one source, Owens was hurt while on site taping a television show for VH1. Another source said Owens tore the ACL during a personal workout but other sources could not confirm the cause of injury.