Denver Broncos quarterback Peyton Manning announces his retirement after 18 seasons in the NFL

Denver Broncos quarterback Peyton Manning poses with Broncos head coach Gary Kubiak (L), general manager John Elway, and CEO/President Joe Ellis (R) at his retirement announcement press conference at Denver Broncos Dove Valley headquarters in Englewood, CO on March 7, 2016. Manning retires after 18 seasons, 5 NFL MVP's, two Super Bowl championships (one in Denver and one in Indianapolis, most NFL touchdown passes, and most yardage passing in the NFL. Photo by Eric Bakke/DENVER BRONCOS/UPI