Corvallis, OR (SportsNetwork.com) - Langston Morris-Walker drove in for a layup with 26 seconds remaining to lift Oregon State to a 58-56 upset win over No. 7 Arizona on Sunday night.

The Wildcats looked to force overtime, but T.J. McConnell missed a runner.

Morris-Walker finished with 12 points and eight rebounds for the Beavers (11-4, 2-1 Pac-12), who posted their first win over a top-10 team since beating these same Wildcats -- then ranked third -- in overtime on March 2, 2000.

"Great win by our guys. I thought they showed unbelievable toughness and resiliency from start to finish," said Oregon State coach Wayne Tinkle.

Gary Payton II scored 10 points with nine rebounds, helping Oregon State end a seven-game slide to Arizona and improve to 10-0 at home this season.

Rondae Hollis-Jefferson had 14 points and McConnell added 13 with six assists for Arizona (14-2, 2-1), which was held to 37.8 percent shooting.

Neither team led by more than four in a game that featured 20 lead changes.

A three-point play by Malcolm Duvivier put Oregon State up 56-52 with 1:33 left. Gabe York then hit a 3-pointer for Arizona, which tied it when Hollis- Jefferson went 1-of-2 from the foul line with 49 seconds to play.

Arizona was up 21-20 at halftime despite shooting just 26.1 percent.