BOULDER, Colorado (Ticker) -- Brad Buckman could not bring slumping Texas all the way back against Big 12 Conference rival Colorado.
Buckman collected 27 points and 21 rebounds - both career highs - but it was not enough as the 22nd-ranked Longhorns fell to the Buffaloes, 88-79, for their fourth loss in five games.
Freshman Richard Roby led five players in double figures with 22 points and grabbed nine rebounds for Colorado (12-9, 4-6 Big 12), which has gone 4-2 in conference play since dropping its first four league games.
Star freshman guard Daniel Gibson, who had averaged 21.4 points in his previous five games, was limited to 10 for the Longhorns (15-7, 4-5), who were playing their first game since learning Monday that freshman standout LaMarcus Aldridge will not return this season from the hip injury that has sidelined him since January 15.
Texas shot just 31 percent (8-of-26) in the first half and trailed at the break, 40-25. Gibson had just two points on 1-of-6 shooting in the opening 20 minutes.
Marcus Hall scored 12 of his 17 points in the first half for Colorado, which committed just two turnovers in the period.
"Anytime you have two turnovers in a half against a top-25 team, that just shows the job you did offensively and defensively," Hall said.
Colorado extended its advantage to 58-36 on a layup by Jayson Obazuaye less than six minutes into the second half before Texas stormed back, pulling within 61-57 on a pair of free throws by Buckman with 7:23 remaining.
But Texas got no closer as it fell to Colorado for just the second time in their last nine meetings.
The Buffaloes committed just five turnovers all night, which the Longhorns converted into only three points. Colorado scored 22 points off 15 Texas giveaways.
Colorado won despite shooting just 39 percent (27-of-69) and getting outrebounded, 48-39. Texas connected on 41 percent (26-of-63).