His "one good season" consisted of a national ranking of #20 at the end of the 2015 season for Toledo. Of course, he had 3 nine win seasons out of 4 at Toledo.
His playing career consisted of being a 2 time All American d-lineman, and Ohio Athletic Conf. Lineman of the year for Division III Mt. Union.
As far as working under great coaches:
He played for and coached under Larry Kehres at Mt. Union. Who is Larry Kehres? Check this out. It is Division III, but listen to this. Kehres retired with a winning percentage of .929, which is the highest ever for a football coach. His record was 323-24-3.
He holds the record for the most national titles at 11, the most conference championships at 23, the most unbeaten seasons at 21. He has 2 unbeaten streaks of over 50 games. 54 from 1996 through 1999, and 55 from 2000-2003.
When he retired, he had won his last 21 conference championships, so he went out a winner. He also holds the record for longest unbeaten streak against conference opponents at 100 games from 1994-2005.
You may say "it's only Div III," but Larry Kehres is the best coach ever at winning. I would think that one could learn a lot from him if he wanted to.