Sumlin took over a program that Briles, a former position coach, turned around, but they do not have a new stadium.
Stoops: True, OU does recruit itself, but Blake almost ran the program into the ground, the same program where he had coached.
Pellini: Callahan's results were worse each year, and Nebraska went after an up and coming coordinator to take his place.
Leach: Again, the point is that he had no head coaching experience prior to coming to Lubbock.
Here are a few other "non-BcS" schools that have hired position coaches or coordinators that have been successful:
East Carolina: Ruffin McNeil; currently 4-2 and undefeated in conference.
Southen Miss: Larry Fedora; currently 5-2 and 2-1 in conference.
Rice: Graham prior to bolting for Tulsa turned that program around was previously a coordinator and assistant HC.
My point is that we don't necessarily need a coach with prior head coaching experience, just the energy and know how to lead a program.