LOS ANGELES — One week after allowing just seven points to Northwestern, No. 23 Stanford was diced up by true freshman Kedon Slovis and USC’s new-look “Air Raid” offense.

Slovis went 28 of 33 for 377 yards and three TDs and didn’t turn the ball over in his first start in place of JT Daniels, who suffered a season-ending knee injury last week, as USC dominated the visiting Cardinal 45-20 Saturday night in the conference opener for both teams.

After scoring on its first four drives to go up 20-10, the Cardinal (1-1, 0-1) didn’t score for the final 38 minutes. Meanwhile, USC (2-0, 1-0) scored touchdowns on six of seven possession under the direction of offensive coordinator Graham Harrell, who brought the Air Raid offense with him from North Texas.

The Cardinal also featured a first-time starter in redshirt sophomore Davis Mills, who went 22 of 36 for 237 yards. Regular starter K.J. Costello, who appeared to sustain a concussion in the season opener, is expected to return next week.

Mills threw a 15-yard touchdown pass to Connor Wedington on Stanford’s first drive, which was set up by Wedington’s 60-yard kickoff return. But after going up 17-3, Stanford trailed 24-20 by halftime and couldn’t keep up with the Trojans in the second half.

It doesn’t get any easier for Stanford, who travel to No. 18 UCF next Saturday and then host No. 16 Oregon on Sept. 21.