Stanford (21-11) built an early 10-point lead, answered when Arizona State tried to make a run and pulled away down the stretch to give its
Dwight Powell scored 15, Josh Huestis added 12 and the Cardinal shot 54% to earn a spot in Friday's semifinals against second-seeded
Arizona State (21-11) got off to a sluggish start for the third straight game and never fully recovered as its top players struggled against Stanford's defense.
Colorado (23-10) led by as much as 11 before the Bears made a late run to make it close.
The Buffaloes went ahead 58-54 when Booker made two free throws with 12.1 seconds left, but Eli Stalzer only converted one of two free throws after Justin Cobbs scored on a layup.
Cal raced down the court to get off a potential tying three-pointer, but Cobbs' shot came up short.
Josh Scott scored 11 points for the Buffaloes, who will face top-seeded and No. 4-ranked
Cobbs finished with 21 points, five assists and four rebounds. Tyrone Wallace added 13 points for Cal (19-13), which shot five of 22 from three-point range.
After playing two close games against Utah during the regular season, top-seeded Arizona (29-3) opened the tournament with a spirit-crushing defensive performance.
Energized by a raucous crowd that made it feel like the McKale Center, the Wildcats provided a glimpse of what can happen when one of the nation's best defenses gets rolling.
Arizona ran through the record book against Utah (21-11), setting marks for fewest points allowed, fewest field goals (12) and lowest shooting percentage (25).
The Wildcats held the Utes to 13 points in the first half, another record, and matched