FILE - This Aug. 24, 2012 file photo shows shows Miami Dolphins quarterback Ryan Tannehill preparing to pass during the first half of an NFL preseason football game against the Atlanta Falcons, in Miami. Youth and inexperience have taken over the most important position in the NFL. Ten starting quarterbacks will have one year or less of experience this season, with five teams letting rookies run the show. (AP Photo/Lynne Sladky, File)