Pac-12 Networks' Yogi Roth looks ahead to No. 22 USC's Holiday Bowl matchup with No. 16 Iowa in San Diego. Roth says the Trojans "are out to prove something" in their season finale. Both teams capped the regular season winning 5 of their last 6 games. The action begins at 5 p.m. PT/ 6 p.m. MT on FS1.