Indianapolis Colts player development coordinator David Thornton, left, and Andrew Luck tour the Pro Football Hall of Fame Saturday, June 30, 2012, in Canton, Ohio. The 2012 AFC rookies toured the hall Saturday. (AP Photo/Tony Dejak)

Indianapolis Colts' Andrew Luck, left, and Cleveland Browns quarterback Brandon Weeden tour the Pro Football Hall of Fame, Saturday, June 30, 2012, in Canton, Ohio. The 2012 AFC rookies toured the hall Saturday. (AP Photo/Tony Dejak)

Jacksonville Jaguars players Andre Branch, left, and Justin Blackmon, center, and Houston Texans' DeVier Posey tour the Pro Football Hall of Fame Saturday, June 30, 2012, in Canton, Ohio. The 2012 AFC rookies toured the hall Saturday. (AP Photo/Tony Dejak)

Indianapolis Colts' Andrew Luck signs an autograph on a miniature Colts helmet during a tour of the Pro Football Hall of Fame Saturday, June 30, 2012, in Canton, Ohio. The 2012 AFC rookies toured the hall Saturday. (AP Photo/Tony Dejak)