Mike Nolan's resume dwarfs that of your average linebackers coach. He has been coaching in the National Football League for 28 seasons. 17 of those were as a defensive coordinator and four others as a head coach. One of those defensive coordinator stints was in Denver at the same time that Mike McCoy was the offensive coordinator there.
Nolan broke into the NFL as a special teams/linebackers coach for the Denver Broncos in 1987 where he stayed for six seasons before taking his first defensive coordinator job with the New York Giants. He has remained a defensive coordinator for all but five seasons since, the four he spent as head coach of the 49ers and one season as a position coach in Baltimore.
This is an exciting hire and we'll have a more in-depth breakdown of his career later.