ENGLEWOOD, Colo. -- Cory Undlin has been named the Broncos' new secondary coach.

Former Secondary Coach Ron Milus' contract was not renewed by the club.

"Cory Undlin is an experienced defensive backs coach who has great familiarity with that role as well as our players and concepts," Head Coach John Fox said. "He has coached the position with multiple NFL teams, including under Jack Del Rio with the Jaguars. I am confident he will be a great fit and get the most out of our secondary.

"I appreciate all of Ron Milus' hard work and wish him the best."

The 2012 season was Undlin's first with the Broncos, and he spent the campaign as the club's defensive quality control coach. He helped the defense post the largest defensive scoring improvement in the NFL (6.3 points per game) while finishing with a No. 2 overall ranking (No. 3 against the rush and No. 3 against the pass).

Undlin is a coaching veteran of nine NFL seasons and has previously served as a defensive backs coach with the Jacksonville Jaguars -- under current Broncos Defensive Coordinator Jack Del Rio -- and the Cleveland Browns.

In addition, Unlin has been a defensive assistant with the Jaguars and New England Patriots. His other titles have included secondary/assistant special teams coach and quality control-defense with the Browns.

In his last season as a secondary coach -- 2011 -- Unlin's defensive backs allowed just two individual 300-yard passers to tie for the fourth fewest in the NFL in addition to surrendering only 43 pass plays of 20-plus yards, which tied for second in the league.

Undlin began his coaching career at his alma mater, California Lutheran University, where he coached linebackers from 1998-99 before being promoted to defensive coordinator in 2000. From 2002-03 he served as a graduate assistant at Fresno State University working with the school's secondary.