That staff is an interesting collection of guys, all very good football coaches.
Other than Rob Black, they only have 3 other "full time teachers", and one of those I know very well and he isn't interested in being a head football coach. Another one has been a candidate for a couple of head coaching positions in the past. Don't know about the third.
The other coaches are either non-classified Knox County personnel, or they are retired educators and just coach. None of those are going to be head coaches in Knox County per KCSS policies.
Plus most of those guys have tight Fulton ties. Guys just don't leave that staff very often. They are very loyal.