TUCSON, Ariz. -- Junior Jake Rodriguez drove in a career-best five runs to send the No. 4 Oregon State to an 8-4 win against No. 21 Arizona on Sunday at Hi Corbett Field. The win gave the Beavers a sweep of the Wildcats in Tucson, Ariz., for the first time in school history.

Michael Conforto homered for the Beavers, who improved to 19-1 on the year and 3-0 in the Pac-12 Conference. Oregon State opened Pac-12 play with a sweep on the road for the second consecutive season after downing California in 2012.

Rodriguez ended the game with two doubles. His first came in the fourth after entering the game as a defensive substitution at catcher in the third. The shot went down the right-field line and scored Ryan Barnes, giving the Beavers a 3-1 lead. Rodriguez helped blow the game open in the sixth. He came to the plate with the bases loaded and no outs and doubled to the gap in left, enabling Barnes, Kavin Keyes and Max Gordon to score for a 7-1 advantage.

Rodriguez later added a sacrifice fly, his third of the series, in the eighth to put Oregon State up 8-4. He finished the day with a 2-for-2 effort.

Conforto, meanwhile, hit his second home run of the series -- and sixth of the season -- in the first. The towering shot to center sent the Beavers to a 1-0 lead that was added to in the second when Barnes scored his first of three runs on a triple by Jerad Casper.

Arizona (15-8, 0-3 Pac-12) moved to within one in the bottom half of the second, but the Beavers scored the game's next five runs.

The Wildcats added a run in the sixth and two more in the seventh to draw within three, but Rodriguez's fifth RBI of the day gave the Beavers breathing room.

Ben Wetzler started for the Beavers and did not figure in the decision after going 4.2 innings. He allowed two hits and one run while walking three and striking out one.

Brandon Jackson was credited with the win for the Beavers after allowing three hits and two runs in 1.1 innings of relief. He improved to 4-0 this season.

Scott Schultz picked up his fourth save of the season after getting the final four outs.

The Beavers managed 10 hits off Arizona starter Cody Moffett and two Arizona relievers. Moffett allowed seven hits and five runs in five innings to drop to 2-1 this season.

Conforto and Andy Peterson each had two hits to join Rodriguez in the multi-hit category.