TUCSON, Ariz. -- Arizona's stay in the top 10 ended after just over a week as USC rolled into Tucson and slipped the cardiac Wildcats 28-26.
How the game was won: Arizona missed three field goals, including a potential game-winner from 36 yards in the waning moments. USC controlled most of the game on both sides of the ball, thwarting the Arizona offense in the red zone and getting the big scoring plays that eluded the Wildcats, at least until the fourth quarter when Arizona made a run and things got wild. The Wildcats scored a late TD but missed the game-tying 2-point conversion. They then recovered the ensuing on-side kick, but Casey Skowron missed his third kick.
Gameball goes to: USC running back Javorius Allen rushed for 205 yards on 26 carries -- 7.9 yards per carry -- with three touchdowns. He will extend his lead as the Pac-12's leading rusher and is getting close to a lock as a first-team All-Pac-12 performer.
What it means: Arizona going down means there are no longer any undefeated teams in the Pac-12. Every team has at least one conference loss, too. USC puts itself back squarely in the South Division race, while Arizona yields the advantage it held after winning at Oregon.
Playoff implication: The best way to get to the playoff is to win all your games. Now no Pac-12 team can do that. And it's going to take a heck of a run for any conference team to emerge with just one conference loss. While few considered Arizona a true threat for the playoff, their loss to the Trojans at home is a hit to the conference's national perception. USC's horribly embarrassing loss at Boston College means the dreaded transitive property can be applied to their Pac-12 wins.
Best play: Allen's big day started early, as he rolled to two long first-half touchdown runs. The first, a 34-yarder, got USC on the board midway through the first quarter, but this 48-yard touchdown run in the second quarter to put the Trojans up 14-6 was really something to behold.
What's next: Arizona is off until it visits Washington State on Oct. 25. USC will try win back-to-back games when Colorado comes to town.