Corey Kispert scored 18 points, Filip Petrusev added 16 and Gonzaga held on for an 84-80 win on Saturday night.
Myles Powell hit his head on the hardwood after taking a charge in Seton Hall's game against Rutgers.
The USC men's basketball team has received a notice of allegations from the NCAA, the school announced in a statement Friday.
Offensive efficiency is down, leaving top teams more vulnerable to getting knocked off.