As I recall, Bronco had Ziggy for three years but only started him about 5 or 6 games of Ziggy’s senior year before Ziggy was drafted 5th overall in the NFL draft.
Now, I know that Ziggy was new to football when he started out, but he had insane talent and Bronco hardly used him.
Ziggy probably started more times as a rookie in the NFL than he did his whole time at BYU.