Following a Chase Budinger dunk the Wildcats decided to play defense rather than foul. Darren Collison missed a lay-in but Alfred Aboya grabbed the offensive rebound and it took another 13 seconds before Mustafa Shakur would foul.
UCLA missed the front end of their next two 1-for-1's and the Wildcats converted with five quick points and the eight point lead was suddenly three.
The Wildcats could get no closer.
Arron Afflalo led the way for the host Bruins. The junior scored 22 points to lead all scorers. Darren Collison added 14 points and seven assists.
The Wildcats actually built up an eight-point first half lead, but the Bruins answered with an 18-4 run to close out the half. Collison gave the Bruins momentum heading into the half when he took the in-bounds pass with just over six seconds to play and drove the length of the court, taking the ball right at Daniel Dillon, to get a lay-in at the buzzer.
That momentum continued into the second half as the Bruins never trailed and led by as many as 12.
The Wildcats' shooting woes continued from the outside. Arizona made just 3-of-15 from behind the arc and saw Budinger and McClellan combine to miss all six of their three-point shots. McClellan has now missed 15 straight three pointers.
Shakur scored 12 points and dished out eight assists.
The Wildcats have lost three Pac-10 games in a row, a first in the Lute Olson era. All told they have lost four of their last five games and fall to 4-4 in the league.