I found the whole thing odd, the head ball coach leaving mid season. My first thought was he was given a choice, either retire or get fired. That does not seem to be the case.
Instead according to his last press conference, he is resigning, not retiring. He gives his reasons in the video.
I never liked the guy much. But I still had to respect his accomplishments on the field. Both as a player and a coach.
ESPN or the SEC Network would be wise to offer him a job.