Just a stupid off-season stat.

3 teams have played each other 4 times:

App State v Richmond
McNeese State v Montana
NDSU v Sam Houston State

20 teams have met up 3 times in the playoffs. Northern Iowa features in 1/4 of those matchups (Montana, Eastern Washington, Eastern Illinois, Marshall, and New Hampshire) and in all five matchups, either UNI won all three games or lost all three games.