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DENVER, CO - SEPTEMBER 13: Quarterback Peyton Manning #18 of the Denver Broncos drops back to pass in the first quarter of a game against the Baltimore Ravens at Sports Authority Field at Mile High on September 13, 2015 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)

DENVER, CO - SEPTEMBER 13:  Quarterback Peyton Manning #18 of the Denver Broncos drops back to pass in the first quarter of a game against the Baltimore Ravens at Sports Authority Field at Mile High on September 13, 2015 in Denver, Colorado.  (Photo by Dustin Bradford/Getty Images)