Olynyk also hauled down 10 rebounds for the Bulldogs (15-1, 2-0 WCC), who notched their sixth straight win.
Elias Harris supplied 14 points and Gary Bell Jr. added 12 in Gonzaga's victory.
The Broncos (12-4, 0-1) were led by Kevin Foster with 29 points, three assists and three steals.
Marc Trasolini provided 19 points and nine boards for Santa Clara.
Teacher apologizes for showing sexual image of herself in class
Dennis Rodman pledges to end trips to North Korea