NORMAN, Okla. (AP) -- Freshman Adrian Peterson ran for 183 yards and scored two touchdowns in his third straight 100-yard rushing performance to lead No. 2 Oklahoma to a 31-7 victory over Oregon on Saturday.

Peterson carried 24 times to become the first Oklahoma freshman to run for at least 100 yards in each of his first three games. His touchdowns in the second half helped the Sooners (3-0) pull away from the Ducks (0-2).

The former Texas high school star burst through a seam on the left side and ran untouched down the sideline for a 40-yard score to put Oklahoma ahead 24-7 late in the third quarter. He bounced off of one tackler and spun past another on an 18-yard touchdown run to put the game away with 3:36 to play.

Jason White was 17-for-23 for 213 yards and a touchdown, and Donta Hickson added a 25-yard touchdown run. Starting tailback Kejuan Jones ran 11 times for 41 yards but didn't play after the first quarter.

White put Oklahoma up 10-0 midway through the second quarter with a 4-yard touchdown pass to James Moses. Before the snap, White directed receiver Travis Wilson to vacate the right side of the offense and Moses came open on that side after a play-action fake.

He also had a 34-yard touchdown pass negated by a holding call two plays before Hickson's TD run. Hickson made it 17-0, running through a potential tackler on his way to the end zone.

Oregon cut it to 17-7 when fullback Dante Rosario made an over-the-shoulder catch of Kellen Clemens' 30-yard pass late in the third quarter. Oregon kicker Jared Siegel tied the Ducks' career scoring mark on the extra point with his 272nd point.

He twice had chances to break the record with field goals in the fourth quarter. On the first, a bobbled snap kept him from getting the kick away and on the second, Oklahoma safety Brodney Pool leaped and blocked a low kick.

Clemens completed 24 of 35 passes for 179 yards.

Clayton -- who caught six passes for 91 yards -- became the Sooners' career leader in receptions with a 20-yard catch in the first quarter. Clayton, who now has 173 receptions, passed Quentin Griffin's record of 169. Clayton already holds the school records with 2,652 receiving yards and 25 touchdown catches.

Both teams had early scoring chances erased by their own mistakes.

The Sooners drove to the Oregon 6 on their second possession of the game, but White fumbled while being pressured by defensive end Devan Long and Matt Toeaina picked up the ball.

Oregon's first scoring chance was snuffed out by back-to-back penalties. After reaching field goal range at the Oklahoma 27, the Ducks were flagged for grabbing a facemask and intentional grounding on consecutive plays to push them back to midfield.

Trey DiCarlo opened the scoring with a 35-yard field goal on the first play of the second quarter for Oklahoma.