Indeed MM was fired as Stallings OC. But fired is really a misnomer - he just was kicked back into the athletic department by the GOBs, where with their support he subsequently became AD. It was an example of poor job performance resulting in a lateral move, something that happens in every organization when you want to remove a really personable but underperforming employee from a delicate position, but do not want to (or cannot) fire him outright. In Mal's case, he could not run an effective offense, but he ended up running the whole show as a result.