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DENVER, CO - NOVEMBER 15: Quarterback Peyton Manning #18 of the Denver Broncos walks into the tunnel following the Broncos loss to the Kansas City Chiefs at Sports Authority Field Field at Mile High on November 15, 2015 in Denver, Colorado. The Chiefs defeated the Broncos 29-13. (Photo by Justin Edmonds/Getty Images)

DENVER, CO - NOVEMBER 15:  Quarterback Peyton Manning #18 of the Denver Broncos walks into the tunnel following the Broncos loss to the Kansas City Chiefs at Sports Authority Field Field at Mile High on November 15, 2015 in Denver, Colorado. The Chiefs defeated the Broncos 29-13. (Photo by Justin Edmonds/Getty Images)