Broncos DC Jack Del Rio singled out second-year DL Malik Jackson as a player that impressed him in Thursday's preseason opener. "I thought he really stood out," Del Rio said. "Malik is having a good camp and quietly making a move himself." Jackson, last year's fifth-rounder, has been rotating in with the first-team defense recently. He played just 123 defensive snaps as a rookie, and we wouldn't expect that to rise dramatically in 2013.