Jacksonville Jaguars 09/22/2007 6:45 AMThe Florida Times-Union reports DT John Henderson could miss the first game of his NFL career Sunday when the Jaguars meet the Denver Broncos at Invesco Field at Mile High. The Jaguars listed Henderson as doubtful on Friday's injury report because of a head injury he sustained last weekend against the Atlanta Falcons. "Big John [Henderson] has not been cleared [by doctors] to play yet," Jaguars HC Jack Del Riosaid.Read more