LAS VEGAS (AP) - KJ Lewis led a balanced scoring attack with 15 points and sixth-ranked Arizona avenged a loss to USC to end the regular season by rolling past the Trojans 70-49 Thursday in the Pac-12 Tournament quarterfinals.

The top-seeded Wildcats (25-7) play Oregon on Friday night in the semifinals. Arizona is two victories from becoming the first three-peat Pac-12 champion since the Wildcats won four straight in 1988-90 and 2002. There were no conference tournaments between 1991-2001.

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Ninth-seeded USC ended its season at 15-18. The Trojans' four-game winning streak also came to a halt.

Jaden Bradley scored 12 points for Arizona. Pac-12 player of the year Caleb Love, who scored two points in the previous meeting with USC, finished with 11, Oumar Ballo posted his 17th double-double this season with 10 points and 13 rebounds and Pelle Larson had 10 points.

WATCH: Postagme Press Conference

Kobe Johnson led USC with 14 points, Isaiah Collier scored 13 and the Trojans shot just 35.7%.

Arizona dominated in nearly every way, beating USC in rebounds (44-30), second-chance points (19-4), bench points (32-3) and transition points (16-2).

The Wildcats remained perfect under coach Tommy Lloyd in the Pac-12 Tournament at 7-0. They also are 10-1 under his watch in Las Vegas, the lone setback a 96-95 double-overtime loss to then-No. 14 Florida Atlantic in December.

Watch: "Play Arizona Basketball" - Jaden Bradley on Pac-12 Network

USC beat Arizona 78-65 to close the regular season, but Lloyd kept his Arizona record intact of never having lost back-to-back games.

Arizona broke open a close game late in the first half by going on a 12-2 run to take a 28-16 lead. The Trojans didn't score over the final 5:49.

USC finally broke the drought 11 seconds into the second half, but that did little to slow Arizona, which led by as many as 24 points.

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