USC forward Saint Thomas, shown here in an earlier game, kept the Trojans close Sunday. Andrej Stojakovic scored 20 points and Jovan Blacksher Jr. 19 and Joshua Ola-Joseph made several plays down the stretch Sunday night to help California beat USC 71-66 in a matchup between former conference rivals in the now-defunct Pac-12. Desmond Claude hit a jumper before Saint …