Brady Hoke and Greg Mattison coached under Jack Harbaugh, alongside his son John, at Western Michigan.
The Wolverines enter the Maui tournament undefeated, untested and so far unimpressive.
Michigan showed glimpses of its No. 17 ranking, but too few in lackadaisical win over Western Illinois.
Western Illinois senior guard Ceola Clark III turns heads with 21-point performance; Jordan Morgan steps up in second half for Michigan.