Kevin Parrom missed a 3-pointer from the right wing at the buzzer and Colorado escaped with a 64-63 win over Arizona on Saturday.
Arizona had a shot at pulling off the win after the Buffaloes' Carlon Brown missed a 3-pointer at the 30-second mark and the Wildcats corralled the rebound.
Arizona coach Sean Miller had used its last timeout at 2:51, however, and the Buffaloes chose not to foul. The Wildcats worked the ball around for a good look but the ball didn't come close.
Brown's 19 points led the Buffaloes (13-6, 5-2 Pac-12), who trailed 39-35 at the half and didn't get much production from Andre Roberson, who came in averaging a double-double but was held scoreless and pulled down just seven rebounds in 25 minutes.
Jesse Perry had 20 points and 10 rebounds for the Wildcats (13-7, 4-3) in their first trip to Boulder since Dec. 9, 1973.