Kellen Dunham scored 13 points, Roosevelt Jones had 12 and Kameron Woods finished with 10 points and 12 rebounds for the Bulldogs (9-2).
Butler recorded the victory while coming off a stunning upset of then-No. 1 Indiana in its previous contest.
The Purple Aces (7-5) were paced by Colt Ryan with 25 points.
Ned Cox added 12 and Ryan Sawvell supplied 10 for Evansville.