Chris Kuper retiring after eight seasons as Broncos offensive lineman – The Denver Post
Former Cincinnati defensive end Derek Wolfe retires from NFL
Elvis Dumervil retires as one of the best Ravens pass rushers ever
Sack-happy Dumervil leads five Broncos to NFL's Pro Bowl – The Denver Post
Five things to watch as the Ravens face the Broncos tonight, Football
Elvis Dumervil: NFL player loses 30M contract because agent's fax machine is so slow it misses signing deadline
2013 Denver Broncos season - Wikipedia
Ravens release pass rusher Elvis Dumervil, creating $6 million of cap room
NFL coaches, players share admiration for Urlacher
Ravens release pass rusher Elvis Dumervil, creating $6 million of cap room
Dumervil season at risk - Eurosport