CORVALLIS, Ore. -- Brian Stamps tallied two hits and three runs and Ben Wetzler scattered one run over seven innings as third-ranked Oregon State defeated No. 21 California 4-2 Sunday afternoon at Goss Stadium.

The win gave the Beavers the series victory after splitting a doubleheader on Saturday. Oregon State remains in first place in the Pacific-10 Conference, by one game over Arizona State, with a 14-4 record. The Beavers are 34-11 on the season.

"I'm very happy with the way we came out today," Oregon State head coach Pat Casey said. "Brian and Kavin (Keyes) were offensive catalysts today and Ben settled down and threw very well after the game-opening home run."

Wetzler allowed a solo home run to Tony Renda to open the game, but settled down to allow just four hits on the day. He struck out seven and did not walk a batter and did not allow California to dent the scoreboard again in seven full innings to improve to 6-2 this season.

Stamps scored three of the Beavers' four runs, doubled in the seventh and stole bases in the first, second and seventh innings. His second run of the game, coming unearned, was scored on a wild pitch and served as the game-winning run.

He gave the club breathing room in the seventh when he doubled to open the inning. After a short rain delay, he moved to third on a sacrifice bunt by Jared Norris, and later scored when Keyes singled through a drawn-in infield. That gave the Beavers a 4-1 advantage, with the game ending on a two-run cushion when Cal scored a solo run in the eighth off reliever Matt Boyd.

Renda's home run gave Cal a quick 1-0 advantage, but the Beavers put two runs on the board on solo singles by both Norris and Keyes.

Keyes ended the game with a 2-for-4 effort, leading the team with two RBI.

Renda and Austin Booker led California with two hits apiece.

Kevin Miller started and lasted just two innings for California (28-16 overall, 12-9 Pac-10), dropping to 5-4 this season. He threw 57 pitches and allowed three hits and three runs while walking three and striking out two.

Tony Bryant saved his ninth game of the season after going 1 2/3 innings. He allowed a hit and struck out one to improve to 9-for-9 in save situations this season.

The series victory was Oregon State's sixth of the season. The Beavers are the lone Pac-10 squad to win its first six league series this season.

Oregon State plays its final non-conference game of the regular season Tuesday night when the Beavers host Portland at 5:35 p.m. PT at Goss Stadium.