I'm not sure how or why you can't count guys. Lovie was a college coach as well. In addition to Saban, Bobby Petrino quit and went back to college. Al Groh resigned from the Jets to take the Virginia job, and he was a pro guy for a decade before going back. Pete Carrol went from NFL assistant, to NFL head coach, back to NFL assistant and then chose college. Lane Kiffin went from college to Pro and college. Spurrier quit the Redskins. Butch Davis went back and forth between the NFL and college, and he resigned (albeit forced) from Cleveland before going back to college. It might be odd to find a guy to leave his current gig and go back to college, but coaches go back to college all the time, and it's not unheard of for them to leave gigs on their own. Dennis Erickson has gone back and forth multiple times. Mike Sherman has gone back. Good ole' Lou Holtz quit the Jets after less than a full season. It happens all the time. Guys get fired or quit NFL gigs and take college jobs. Back in the day when I had season tickets to Fighting Illini games in Champaign in the late 80's or early 90's (Griffith was the running back at the time), the head coach was a former NFL head coach. His name escapes me right now since I'm old. Jason Verduzco was the QB that year, IIRC. John Mackovic?