With UConn scratched from the list, only four major programs boast a clean NCAA rap sheet.

Boston College, Northwestern, Penn State, and Stanford are the only programs without a major case in their histories, and two of them carry asterisks. Boston College and Northwestern endured point-shaving scandals that weren't adjudicated by the NCAA.

Derrick Williams had 21 points and eight rebounds as Arizona topped Stanford 78-69 on Thursday night to grab first place in the Pac-10.

It was the fourth straight win for the Wildcats and the seventh in their last eight games.

"Our team played with a lot of poise and executed well on the road," Arizona coach Sean Miller said. "The shots we took and got were good shots. We had a problem rebounding, but we put together a couple of good shots and got a key rebound or two, and kind of broke the game open in the last 4 minutes."

The win allowed Arizona to slide ahead of Washington, who lost to Oregon State, in the conference standings.