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Associated Press
Colorado's Askia Booker, left, keeps the ball away from Oregon State's Ahmad Starks during the first half of a Pac-12 Conference tournament NCAA college basketball game, Wednesday, March 13, 2013, in Las Vegas. (AP Photo/Julie Jacobson)

LAS VEGAS — Jahii Carson has always loved the spotlight, embracing the hype that has followed him since his high school days.

Faced with the brightest lights of his young career, the fabulous freshman rose above everyone else.

Carson scored five of his 34 points in overtime in his first college postseason game, helping Arizona State hold off Stanford 89-88 in the opening round of the Pac-12 tournament on Wednesday. Carson's 34 points were the most by a freshman in tournament history.

"I just try to come up big on big stages," Carson said. "I know my teammates look a lot for me to create for them and create for myself, and I try to go out there and make big plays."

Meeting for the second time this season, the Cardinal and Sun Devils traded 3-pointers, dunks and small runs in an entertaining opener to the four-day tournament at the MGM Grand Garden Arena.

Arizona State (21-11), the tournament's ninth seed, went up six with about 2 minutes left in regulation, but Stanford (18-14) rallied, tying it at 79 on Aaron Bright's four-point play with 38 seconds left.

Carson, who missed a 3-pointer at the end of regulation, put Arizona State up three with a layup in overtime, and Evan Gordon hit 5 of 6 free throws to send the Sun Devils to the quarterfinals today against No. 21 UCLA.

Carrick Felix had 19 points and 12 rebounds, Gordon made 9 of 11 free throws to finish with 16 points, and Jonathan Gilling added 14 for the Sun Devils.

Carson hit 14 of 22 shots, including 3 of 4 from 3-point range, and had four assists while just missing the school freshman record of 35 points.

(5) COLORADO 74, (12) OREGON STATE 68: Spencer Dinwiddie scored 20 points and Colorado picked up a much-needed win at the Pac-12 tournament.

Colorado (21-10) needed a couple of wins in Las Vegas to boost its NCAA chances and got off to a good start by dominating Oregon State defensively most of the second half.

Xavier Johnson had 16 points and Andre Roberson 12 for the fifth-seeded Buffaloes, who moved on to face No. 4 seed Arizona in today's quarterfinals.

Oregon State (14-18), the No. 12 seed, pulled off one of the biggest upsets in Pac-12 tournament history by knocking off top-seeded Washington last year and dimmed Colorado's NCAA hopes with a win in Boulder last weekend.

The Beavers fell short of repeating either performance by struggling against Colorado's defense, hitting 7 of 25 from 3-point range.

Roberto Nelson had 20 points, and Eric Moreland had 14 points and 13 rebounds for Oregon State, which went 3 for 17 from the arc in the second half.

Colorado had a 43-30 rebounding advantage, including 17 on the offensive glass that led to 18 points.

Colorado entered the Pac-12 tournament on the NCAA bubble after losing its season finale to Oregon State at home.

WASHINGTON 64, WASHINGTON STATE: Scott Suggs scored 19 points as the Huskies held off a second-half rally and advanced in the Pac-12 Tournament.

Pac-12 Tournament

At MGM Grand Garden Arena

1 p.m. – Arizona State (9) vs.

UCLA (1)

3:30 p.m. – Arizona (4)

vs. Colorado (5)

7 p.m. – Utah (10) vs. California (2)

9:30 p.m. – Oregon

(3) vs. Washington (6)