I'm trying to think back to other seniors on the team.
Cary Eades is an obvious choice, and my first guess would be that he played in all three games. I know Frank Burggraf was a senior in '82 as well. For some reason, however, I don't remember him playing in the '82 championship game. I don't know if he was injured or not.
I also think Mike Stone was a senior that year, but for some reason I thought he was one of those guys who played at UND for a year or two, then left, and then came back, and I'm too lazy to look up to see whether he was there for all three years.
It would have to be someone from that time frame, however, since we don't have three championship games in four years at any other point in time.