'Vance Walker, free agent: Walker spent 2016 on the Broncos' IR list after he suffered an injury that August. In 2015 in Denver, the former Georgia Tech standout had a +11.8 run-stopping grade that featured 25 run-game stops on just 447 snaps. The 30-year-old, 6-foot-2, 304-pound defensive tackle wouldn't provide a ton of pass-rush but could help clog the middle.'