NORMAN, Okla. -- Adrian Peterson can't explain how he does it. Running with the ball just comes naturally to the gifted freshman.
Stepping in for an injured starter, Peterson ran for 183 yards and two touchdowns in his third straight 100-yard game, leading 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).
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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.
On other runs, he'd spin, stop and start, or just run past would-be tacklers.
"It's all instincts really," Peterson said. "I really can't remember. I kind of amazed myself a little bit."
Oklahoma 31, Oregon 7 Game Highlights (O-Zone)
Bob Stoops Post-Game Press Conference (O-Zone)
Jason White was 17-for-23 for 213 yards and a touchdown, and Donta Hickson added a 25-yard touchdown run. Starter Kejuan Jones ran 11 times for 41 yards, but didn't play after the first quarter. Oklahoma coach Bob Stoops said Jones sprained his ankle and could've returned, but Peterson was performing well enough that it wasn't necessary.
"I thought Adrian was really special again tonight," Stoops said. "I'm really impressed with his speed and ability to break away and make some big plays."
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.
"We were kind of sluggish coming out but we kept playing our game... ," White said. "It showed a lot about our offense the way we kept on playing."
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.
"Those are points we needed," Oregon coach Mike Bellotti said. "If we had got the first one, we wouldn't have kicked the second one."
Clemens completed 24 of 35 passes for 179 yards as Oregon lost its first two games for the first time since 1992.
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.
"When I got here, I would just learn from the guys that were already here," Clayton said. "They would tell me what I was messing up and what I needed to do it right. When the coaches called on me, I just made sure I did my job."
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.