Colorado dropped their fifth game in their last six outings, falling 72-58 to Oregon State.
"This team, when it comes time to make that push, we just don't have it," head coach Tad Boyle told AM-850 after the loss. "This team just doesn't believe in themselves right now, they're very fragile right now, mentally."
In an historically dismal first half, Colorado shot just 14 percent from the floor. CU had just four points in the first 11:37, and went into the locker room down by 22, 34-12.
Remarkably - outside of Wesley Gordon, who was 3-of-3 in the first half - Colorado was 0-of-18 from the field in the first 20 minutes of play.
Colorado looked like a completely different group on the offensive end of the floor in the second half, shooting 48 percent.
The Buffs were able to cut the OSU lead to single digits in the waning minutes.
Askia Booker hit a pair of free throws with 5:01 to play to bring Colorado to within nine, 52-43. Oregon State countered with two Malcolm Duvivier free throws, but Xavier Johnson knocked down a three-pointer to cut the deficit to eight points - the closest the Buffs would get in the second half.
CU returns to Boulder to face No. 7 Arizona and Arizona State, closing out the 2014-15 home schedule.