The Broncos have signed kicker Matt Prater to a four-year contract. Denver placed their franchise tag on the six-year NFL veteran in March. "This was the final piece in setting our roster for camp, and we are thrilled Matt is going to be a Bronco for a long time. ... Matt has developed into one of the NFL's elite kickers and is a big part of our team.," Broncos executive vice president John Elway wrote in a series of tweets announcing the deal.