It's all about the defense so far from the Trojans.
Spectacular defense has neutralized a Cal offense so far, and with seven minutes to play, USC has taken a 15-13 lead.
Marcus Johnson has added two hoops for the Trojans to support Dwight Lewis, and Alex Stepheson put in a turn-around jumper.
Cal has already committed eight turnovers; USC has six.
USC athletic director Mike Garrett is in attendance at Cal's Haas Pavilion.