2013 Outlook: John Fox's defense sacked opposing QBs a league-high 52 times last year. When opponents turned to their run game, they had similar problems, as the Broncos D allowed a league-low five rushing touchdowns. Denver signed Terrance Knighton, drafted Sylvester Williams and re-signed Kevin Vickerson to jam the middle, plus Dominique Rodgers-Cromartie was brought in to join Champ Bailey in coverage. The big question mark here, however, is how the Broncos will deal with the six-game suspension of Von Miller. With no Elvis Dumervil around because of a fax-related mishap, veteran Shaun Phillips will have to fill Denver's primary pass-rusher role in September.