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Jae C. Hong, Associated Press
Utah's Alex Mortensen, left, looks to pass as he is defended by Colorado's Askia Booker during the first half of an NCAA college basketball game at the Pac-12 conference championship in Los Angeles, Wednesday, March 7, 2012.

LOS ANGELES — Colorado holds a 25-23 halftime lead over Utah in the Pac-12 Tournament at the Staples Center. The game pits the two newcomers to the conference.

Utah got downright defensive early in the first half. The Utes jumped out to an 11-4 lead while holding Colorado scoreless for more than 10 minutes. The Buffaloes missed 10 consecutive shots from the field after Carlon Brown opened the game with a layup. The drought ensued just over a minute later following a pair of free throws by Andre Roberson.

Trailing 4-0, Utah reeled off 11 straight points to take control. Jason Washburn paced the outburst with four points, while Cedric Martin and Dijon Farr each added three. A free throw by Anthony Odunsi accounted for the other score.

The Buffaloes didn't respond until Roberson stole the ball from Martin and raced down the floor for a dunk with 8:22 left to play in the half. It ushered in a 6-0 run that pulled them back into contention at 11-10.

After Utah regained some breathing room on a 3-pointer by Chris Hines, Roberson fueled another Colorado outburst — netting five points in an 8-0 spurt that gave the Buffaloes an 18-14 advantage. They eventually expanded the lead to five points before Farr closed the gap on a buzzer-beating shot from beyond the arc.

Roberson tops all scorers with 12 points at the break. Brown, who played three seasons at Utah before transferring to Colorado, has nine.

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