[bigjosh]

Originally Posted by farmerchief

So his job and function is to coach Sutton up enough, he can improve the quality of the defense?

no.
https://en.wikipedia.org/wiki/Quality_control_coach

Spoiler!

There are three different types of quality control teams: offensive, defensive, and special teams. Offensive quality control will chart the upcoming teams' defense for various down and distance situations, field positions and how many times they use particular personnel groupings. Defensive quality control will do similar analysis of the offense. Special teams quality control will figure out what players are used in various special situations such as kickoff and punt.