Indianapolis Colts quarterback Peyton Manning, right, and his wife Ashley walk through the Booksellers Area as they arrive for the State Dinner in honor of Queen Elizabeth II and her husband Prince Philip, Monday, May 7, 2007, at the White House in Washington. (AP Photo/Haraz N. Ghanbari)
Denver Broncos quarterback Peyton Manning, left, and New England Patriots quarterback Tom Brady, right, meet after the Patriots' 31-21 win in their NFL football game, Sunday, Oct. 7, 2012, in Foxborough, Mass. (AP Photo/Steven Senne)
Denver Broncos quarterback Peyton Manning (18) stretches before playing against the San Diego Chargers in an NFL AFC division playoff football game, Sunday, Jan. 12, 2014, in Denver. (AP Photo/Jack Dempsey)
Denver Broncos quarterback Peyton Manning (18) looks to pass against the San Diego Chargers in the third quarter of an NFL AFC division playoff football game, Sunday, Jan. 12, 2014, in Denver. (AP Photo/Jack Dempsey)
FILE - In this Jan. 12, 2014 file photo, Denver Broncos quarterback Peyton Manning calls an audible at the line of scrimmage against the San Diego Chargers in the second quarter of an NFL divisional playoff football game in Denver. Folks who watched the Broncos' NFL playoff win over the San Diego Chargers on television Sunday couldn't help but notice how often, and loudly, Manning used the code word "Omaha" as he barked signals. Greater Omaha Chamber of Commerce president and CEO David Brown said he wants to explore the possibility of hiring Manning, one of the sporting world's top pitchmen, to shoot a promotional ad for Omaha. (AP Photo/Charlie Riedel, File)
Denver Broncos quarterback Peyton Manning walks off the field after Denver beat the San Diego Chargers 24-17 in an NFL AFC division playoff football game, Sunday, Jan. 12, 2014, in Denver. (AP Photo/Jack Dempsey)
Denver Broncos quarterback Peyton Manning, left, greets San Diego Chargers coach Mike McCoy after the Broncos beat the Chargers 24-17 in an NFL AFC division playoff football game, Sunday, Jan. 12, 2014, in Denver. (AP Photo/Jack Dempsey)
San Diego Chargers quarterback Philip Rivers, left, and Denver Broncos quarterback Peyton Manning greet each other at midfield after the Broncos beat the Chargers 24-17 in an NFL AFC division playoff football game, Sunday, Jan. 12, 2014, in Denver. (AP Photo/Jack Dempsey)
Denver Broncos quarterback Peyton Manning (18) calls an audible at the line of scrimmage against the San Diego Chargers in the first quarter of an NFL AFC division playoff football game, Sunday, Jan. 12, 2014, in Denver. (AP Photo/Charlie Riedel)