Arizona's T.J. McConnell hit a 3-pointer right before the buzzer to take a 27-24 lead into halftime of Friday night's Pac-12 Tournament semifinal game against Colorado in Las Vegas.

Colorado went on an 11-2 run before McConnell's 3 to tie get back in the game.

CU's Xavier Johnson leads the Buffs with nine points and four rebounds in the first 20 minutes of play. Aaron Gordon is pacing Arizona with six points, six boards, three assists, two steals and two blocks.

The Buffs were just 1-of-5 at the free throw line in the first half and were also out-rebounded 25-15.