Did John Cooper win a national championship?

Yes, John Cooper won a national championship as the head coach of the Ohio State Buckeyes football team in 1996. However, he is perhaps more famously known for his time at Ohio State during which he led the team to multiple Big Ten Conference titles and several bowl games, though he did not win a national title with the Buckeyes. His coaching career also included a stint at Arizona State, where he had earlier success.