Its the DC. Dude works ridiculous hours and watches old DCM tapes of opponents for fun in his free time. LB wouldn't hand the keys to his defense to anyone that couldn't cut the mustard. DC and TE coach may be the best kept secrets in Knox Co.
If that be the case, Knox Co wouldn't let him be both AP and head coach would they? They would have to find other ways to make the numbers work I'd assume.