Pac-12 Networks football analyst Yogi Roth previews Friday's season opener for defending Pac-12 south champion Colorado against their rival Colorado State. The Buffs offense looks like it'll still be explosive in 2017, while the defense will need to develop younger, less experienced players.. Catch kickoff of the Rocky Mountain Showdown from Mile High Stadium on Friday, Sept. 1 at 5 p.m. PT/6 p.m. MT on Pac-12 Network.