CORVALLIS, Ore. – First baseman Gabe Clark drove in four runs and No. 2-ranked Oregon State defeated UCLA 9-3 on Saturday night at Goss Stadium to clinch their Pacific-12 Conference series. OSU also won the opener, 4-2 on Friday night.

It was the 10th consecutive win overall and the 10thstraight Pacific-12 Conference victory for the Beavers (37-8, 19-4), who extended their lead over second-place Washington to 34 percentage points (.826-.792) in their bid to repeat as Pac-12 champions. They are 12-1 in their last 13 and 17-2 in their last 19.

Clark singled twice and had a sacrifice fly in matching his career high for RBIs. Center fielder Jeff Hendrix added three singles, three runs and two stolen bases and Dylan Davis and Trever Morrison drove in two runs apiece for the Beavers. Davis, who doubled, singled, scored and stole a base, leads the Pac-12 with 56 RBIs; he also led the league in 2013, with 61.

The Beavers never trailed in defeating the Bruins (23-24-1, 10-13) for the fourth time in a row over the past two seasons. Clark drove in two runs with a two-out single in the first inning for a 2-0 advantage and starter Andrew Moore and three relievers kept UCLA in arrears the rest of the way. Moore struck out three, did not issue a walk and is 3-0 with two no-decisions and a 3.06 ERA in his last five starts.

Designated hitter Nick Rulli added two singles and an RBI and second baseman Andy Peterson scored twice, stole a base and had two sacrifices.

Moore allowed three runs and 10 hits through 6 2/3 innings before being relieved with the bases loaded and a 4-2 lead. A hit batsman drove in one run to trim the lead to 4-3, but reliever Brandon Jackson struck out pinch-hitter Nick Kern to end the threat and the Beavers scored five times in the bottom half to break it open.

UCLA, 1-8-1 in its last 10 games, drew within one run three times (2-1, 3-2, 4-3) but the Beavers responded with runs of their own in each instance to maintain at least a two-run cushion. They have now won four consecutive series against UCLA and are 8-3 in the rivalry since 2011, inclusive.

The crowd of 3,056 raised the season total to 51,944 in 19 openings, an average of 2,734 per date. The Beavers have drawn 2,032 or more fans to every game.

The series concludes at 3:05 p.m. Sunday. The scheduled starters are righty Cody Poteet (3-3, 3.90) for the Bruins and leftyJace Fry (9-1, 1.59), the current Pac-12 Pitcher of the Week, for the Beavers.

Tickets can be purchased via BeaverTickets.com, by calling 1-800-GOBEAVS or visiting the ticket office at Goss Stadium, which opens at 3 p.m. on Sunday.

The Beavers then meet Portland at 5:35 p.m. Tuesday at Volcanoes Stadium in Keizer. Starters for that game are TBA.

For more information on the Oregon State baseball team, follow the club's official Twitter account at Twitter.com/Beaver_Baseball or by Facebook at Facebook.com/OregonStateBaseball.