USC claws out of a three-goal hole, but the hosts prevail.
The Bruins won the 123rd meeting between the two teams to improve to 105-17-1 with their 12th consecutive win over UCSB.
USC looks to avenge a tight loss to the Tigers with a trip to Stockton this weekend.
USC junior Jacob Mercep led the way with seven goals in a winning weekend for the Trojans.
Jake Ehrhardt nets the game-winner in the fourth while defense holds tight to close out the road victory for the Trojans.
Vaios Vlahotasios hauls in a career-high 15 saves to help anchor the Trojans to a home victory.