Kansas City Chiefs at Denver Broncos

FILE - This Sept. 9, 2012 file photo shows Denver Broncos quarterback Peyton Manning (18) signaling against the Pittsburgh Steelers during the first quarter of an NFL football game in Denver. The best spies in the NFL these days aren't behind enemy lines but on the quarterback's own side of the ball. Every game, two of his interior offensive linemen are miked up for network TV, bringing the sounds of the game to millions of viewers _ and future opponents _ who hear the quarterback's cadence, codes and cues, all of which are enshrouded in an increasing amount of gibberish. (AP Photo/Joe Mahoney, File)