USC took home its first Pac-12 title since 2008 with a victory over Stanford in 2017. And the Trojans are gearing up to defend their title with a stable of talented quarterback options to replace Sam Darnold. See the Trojans open 2018 against UNLV on Sept. 1 at 1 p.m. PT/ 2 p.m. MT on Pac-12 Network and Pac-12 Los Angeles.