His successor was Pruitt (and a GA)
Their performance fell over a cliff (their pregame warmups were disorganized as hell, the substitution pattern was weird and their play fizzleing sucked!)
You can see the difference in quality of DL coaches looking at the DL play under Garner
Rocker was the DL coach in 2018-19, was let go in off season, and was replaced by Jimmy Brumbaugh, who was then fired in the Kentucky game. I was saying the DL didnt do as well through the first 3.5 games which led to the Brumbaugh firing.
I have no doubt it got even worse from there on, but the DL didnt do as well with Brumbaugh as it did with Rocker.