LOS ANGELES -- After hanging half a hundred points on their crosstown rivals, Matt Barkley and his Southern California teammates returned to the Coliseum locker room to find T-shirts on their chairs proclaiming the Trojans to be the Pac-12 South champions.

Sanctions will keep USC out of the conference title game. These resilient Trojans still believed they proved which team should be on a flight from Los Angeles to Eugene, Ore., next week.

Barkley passed for 423 yards and six touchdowns in his possible Coliseum farewell, Robert Woods set the conference's single-season receptions record while catching 12 passes for 113 yards and two TDs, and No. 10 USC finished its resurgent season with a 50-0 demolition of Pac-12 title game-bound UCLA on Saturday night.

Marqise Lee had 13 catches for 224 yards and two TDs during a showcase of offensive brilliance by the Trojans (10-2, 7-2), who are banned from postseason play under heavy NCAA sanctions for violations that occurred before these players arrived at USC. The Trojans still went out in style, jumping to a 29-point halftime lead before posting their largest victory in the city championship game since 1930, the rivalry's second year.

"We've worked hard for this, and I think we deserve to celebrate this," said Barkley, who surpassed Matt Leinart's single-season conference record for touchdown passes. "We knew (about the postseason ban) coming into this year, and there's nothing we can do about it. We just tried to take advantage of every opportunity we did have."

USC won seven of its final eight games capped by this utter obliteration of the Bruins (6-6, 5-4), who will represent the division at Oregon next week despite finishing two games behind the Trojans in the South standings.

Earlier this week, UCLA coach Rick Neuheisel said he felt the Bruins had "closed the gap more" with the Trojans, who won 10 games for the eighth time in the past decade.

Mind the gap, UCLA.