The Denver Broncos have added Cory Undlin to their defensive coaching staff as a quality control coach. Undlin has been in the NFL as an assistant since 2004. He worked in Jacksonville for the last three seasons under then-head coach Jack Del Rio, who is now Denver’s defensive coordinator. Undlin takes the position vacated by Jay Rodgers, who was promoted to defensive line coach after Wayne Nunnely retired earlier this month after three years in that position with the team.