Cooley was 7 of 7 from the field and 5 of 6 from the line. Jerian Grant added 15 points and seven assists for the Fighting Irish (8-5), who shot 61 percent (35 of 57) from the field, including 53 percent (9 of 17) on 3-pointers, in recording their 27th consecutive home victory. Eric Atkins scored 13 points, and Alex Dragicevich and Joey Brooks had 12 apiece.
Notre Dame got 27 points at the free-throw line on 34 attempts, to only 15 for Sacred Heart.
Shane Gibson scored 22 points for the Pioneers (6-7), leaving the senior 11 points shy of 1,000 for his career.
With a victory in its final nonconference game of the season, Notre Dame improved its record against current Northeast Conference teams to 26-0.