No. 12 USC wraps up its regular-season schedule against rival Notre Dame at 12:30 p.m. Saturday, but the most important matchup for the Trojans will be played in Boulder, Colo., where No. 9 Colorado is hosting No. 22 Utah at 4:30 p.m.
If the Utes pull off an upset, the Trojans will clinch the Pac-12 South division title and will play No. 5 Washington, which they beat two weeks ago, in the Pac-12 vhampionship game on Friday in Santa Clara.
Notre Dame, 4-7, is coming off a loss at Virginia Tech while the Trojans defeated rival UCLA and are on a seven-game winning streak.