When Anthony Barr roared through the line and hit Matt Barkley squarely in the No. 7 on his back, the roar rising out of the Rose Bowl was loud enough for a whole city to hear. After so many years underneath Southern California, UCLA is on top of Los Angeles and the Pac-12 South, thanks to a first-year head coach and a freshman quarterback who don't realize they've done something that's not usual. "Well, it is for me," Jim Mora said. Brett Hundley passed for 234 yards and a touchdown and rushed for two more scores as No. 17 UCLA beat USC (No. 18 BCS, No. 21 AP) 38-28 on Saturday, clinching the Pac-12 South title and emphatically snapping a five-game losing streak in their crosstown showdown.