NFL quarterback Peyton Manning, left, walks across a football practice field with Denver Broncos executive John Elway, right, near Wallace Wade Stadium, Friday, March 16, 2012, at Duke University in Durham, N.C. Elway and coach John Fox watched the star quarterback throw at Duke's athletic fields. (AP Photo/The News & Observer, Travis Long)
NFL quarterback Peyton Manning, left, walks across a football practice field with Denver Broncos executive John Elway, right, near Wallace Wade Stadium, Friday, March 16, 2012, at Duke University in Durham, N.C. Elway and coach John Fox watched the star quarterback throw at Duke's athletic fields. (AP Photo/The News & Observer, Travis Long)