Oregon State defeated No. 19 Washington 68-56 on Thursday night in a Pac-10 upset.
The Beavers had lost three straight and six of seven. It was their first win over a ranked team since 2006.
"We don't want to celebrate too much," said Omari Johnson. "But be happy that we won and get our groove back."
It was Washington's second straight loss.
"If we're not disciplined on defense, that is on me. It's my fault," coach Lorenzo Romar said. "I have to get our guys to play better defense. We're capable of doing it, we've done it before, but we've gotten away from it lately."