Oregon State 36, USC 7 (final)
USC has a three-game losing streak at Oregon State and a five-game losing streak in the state of Oregon.
Bookend plays in the second quarter sealed the Trojans' fate this time.
On the first play of the quarter, Jordan Poyer picked off a pass by USC quarterback Matt Barkley and returned it 65 yards for an Oregon State touchdown.
On the last play of the quarter, Barkley sustained an injury to his left ankle that left him in street clothes and on crutches for the second half.
Marc Tyler, USC's top running back, didn't make it all the way through the game either. He reaggrevated an ankle injury after gaining 34 yards in 11 carries.
Oregon State physically dominated the Trojans in the wake of back-to-back losses to UCLA and lowly Washington State.
The Beavers improved to 5-5 overall, 4-3 in Pacific 10 Conference games. USC fell to 7-4, 4-4.
Ryan Katz, from Santa Monica High, completed 17 of 24 passes for 154 yards and two touchdowns, but the offensive stars for Oregon State were running backs Jacquizz Rodgers and Markus Wheaton.
Rodgers ran for 127 yards and a touchdown in 26 carries and Wheaton had 63 yards in six carries. They were also the Beavers' top receivers. Rodgers had seven catches for 43 yards and Wheaton five for 40.
Third-string running back C.J. Gable was USC's lone bright spot. He led the Trojans with 57 yards rushing and a touchdown in 10 carries and also had 130 yards in five kickoff returns.
Barkley completed 10 of 19 passes for 75 yards, and backup Mitch Mustain completed eight of 17 passes for 60 yards.
USC was penalized eight times for 85 yards.
Oregon State 36, USC 7 (late fourth quarter)
The rout is on.
Mitch Mustain fumbled while being sacked by Taylor Henry, and the Beavers almost immediately cashed in the mistake.
Oregon State 29, USC 7 (5:50, fourth quarter)
Oregon State's mastery of USC in Corvallis continues.
The Beavers just secured their third consecutive win over USC on their home field when Ryan Katz connected with Jordan Bishop on a five-yard scoring pass.
A two-point conversion pass failed, meaning that if the Trojans can score 24 points in the next five minutes or so, they can win.
Don't bet on that. Even a little, at long odds.
Oregon State's scoring drive was 62 yards in seven plays -- 47 of the yards on runs by Jacquizz Rodgers and Markus Wheaton.
Rodgers has carried 23 times for 105 yards, just three yards shy of his career average.
Oregon State 23, USC 7 (late third quarter)
USC's second-string backfield just put up the first score of the game for the Trojans.
Seldom-used C.J. Gable, who gave USC great field position with a 56-yard kickoff return, made a nifty 13-yard run around left end and dove just inside the pylon for the touchdown.
Reserve quarterback Mitch Mustain completed two passes for 18 yards to Ronald Johnson on the drive and Gable carried three times for 19 yards. Allen Bradford, another backup running back, had one carry for two yards.
Starting quarterback Matt Barkley won't be playing again tonight. He's is on the sideline on crutches and dressed in street clothes, his injured left foot in a boot.
Oregon State 20, USC 0 (early in third quarter)
USC quarterback Matt Barkley suffered a sprained ankle at the end of the first half when he was sacked by Oregon State tackle Kevin Frahm, a USC sports information official said.
Mitch Mustain is playing quarterback for the Trojans.
His first pass on a third-and-six play at the Trojans' 22-yard line fell incomplete. His second pass, also on a third down, also fell incomplete.
Oregon State 20, USC 0 (halftime)
Oregon State added injury to insult just before the end of the second quarter when tackle Kevin Frahm sacked USC quarterback Matt Barkley.
Barkley lay on the turf for a few minutes before getting up and walking to the sideline with assistance from team trainers.
Less than a minute before, Justin Kahut kicked his second field, a 38-yarder, to give Oregon State a commanding lead.
Jacquizz Rodgers has rushed for 68 yards and a touchdown in 12 carries. The junior also has five recpetions for 48 yards.
Barkley has completed 10 of 19 passes for only 75 yards, with an interception. He also has been sacked twice.
Marc Tyler has rushed for 30 yards in nine carries.
Oregon State 17, USC 0 (middle of the second quarter)
Where have we seen this before?
Oregon State takes advantage of USC turnovers and bolts to a big first-half lead.
It's happening again, just like it always seems to when the Trojans play at Reser Stadium.
Jacquizz Rodgers just scored on a three-yard run to cap a 53-yard, seven-play drive.
The key play came on fourth and six at thew USC 38. Beavers punter Johnny Hekker threw a pass intended for Jordan Poyer and USC cornerback Nickell Robey was penalized for pass interference, giving Oregon State a first down at USC's 24.
Quarterback Ryan Katz then connected with receiver Aaron Nichols on a 24-yard pass to set up Rodgers' touchdown.
Oregon State 10, USC 0 (early in second quarter)
Oregon State cornerback Jordan Poyer just returned an interception 65 yards for a touchdown to give the Beavers a 10-point lead one play into the second quarter.
USC quarterback Matt Barkley was attempting to hit fullback Stanley Havili along the left sideline, but Poyer jumped the route.
Justin Kahut kicked a 34-yard field goal with 30 seconds left in the first quarter to give the Beavers the lead.
USC looked like it was driving toward a touchdown on its first possession, especially when tailback Marc Tyler carried on a fourth-and-two play at the Oregon State 26 and was awarded a generous spot.
The play, however, was reviewed and then reversed, giving Oregon State the ball.
The teams traded possessions before Oregon State drove 37 yards to the Trojans' 17, where Kahut made his kick.
Photo: USC quarterback Matt Barkley lies on the ground in pain, attended to by center Michael Reardon, after being sacked by Oregon State's Kevin Frahm late in the second quarter Saturday. Credit: Wally Skalij / Los Angeles Times