+6 spots (previously 22). Big move due to so many teams losing that were not far ahead of them. Plus they had a big win over a potentially upsetting team that is Arizona State.
USC has two losses, one of which was a butt whooping from Notre Dame. They do have some good wins, though. They killed Arizona State this weekend, after the Sun Devils were looking better. They also have a big win over Stanford. 
USC looks to be back on the right track after an impressive showing against Arizona State. Their looming showdown with Arizona this coming Saturday will likely decide the Pac-12 South championship.
I'm not sold on USC after the ass whoopin they took from ND, but they did destory poor ol ASU who just recently beat up on Washington....Fucking Pac12 is weird...