NORMAN, Oklahoma (Ticker) -- De'Angelo Alexander and Lawrence McKenzie picked an opportune time to knock down some 3-pointers.
Alexander nailed a pair shots from beyond the arc and McKenzie added another - all in a decisive run down the stretch as Oklahoma posted a 63-48 Big 12 Conference victory over No. 19 Texas Tech.
Oklahoma (15-5, 5-4 Big 12) was held to its lowest point total since 1955 in Sunday's 66-37 loss at Texas. Alexander and McKenzie combined to miss all eight of their 3-point attempts as the Sooners shot 1-of-21 from beyond the arc.
"We were embarrassed last Sunday at Texas," Oklahoma coach Kelvin Sampson said. "It just shows you what kind of team this is. Anybody can keep their head up when things are going good, but our team showed their character by bouncing back tonight."
After building a 31-21 halftime lead, Oklahoma watched as Texas Tech (17-6, 5-4) rallied. But Alexander nailed a deep 3-pointer from the left corner for a 48-41 lead with 6:46 left to play.
The Red Raiders' Devonne Giles countered with a short hook shot to cut the deficit to five points. But Alexander answered with another 3-pointer, McKenzie drained two free throws and added his own shot from long range for a 56-43 advantage with 4:12 remaining.
"I was in the position to knock down the shots," Alexander said. "I have to attribute a lot of that to my teammates for getting me in those spots. As each shot fell, my confidence kept going up."
Oklahoma finished 9-of-22 from the arc, including 3-of-5 shooting by Alexander. The Sooners improved to 11-1 at home and won for just the second time in five games against ranked opponents.
McKenzie, who made 7-of-9 foul shots, led Oklahoma with 15 points and Alexander and freshman Drew Lavender each scored 11 points. The trio also combined for 12 assists.
"Coach told me from the jump ball to attack and get to the line," McKenzie said. "That's exactly what I did. I attacked hard and got to the line."
The Sooners bolted to a 23-8 advantage just past the midway point of the first half as the Red Raiders were sloppy and uninspired from the start. Texas Tech committed 16 of its 22 miscues in the first half and had only eight baskets through 20 minutes.
"We had 16 first-half turnovers and I think last year we were averaging around 12 a game," Texas Tech coach Bob Knight said. "Our guard play has not been good in terms of getting the ball to people that are open and we have to figure out something to take care of that."
Andre Emmett led Texas Tech's charge in the second half with 15 of his 22 points. His dunk with 9 1/2 minutes left pulled the Red Raiders within 43-41.
Oklahoma's Johnnie Gilbert answered with a dunk to set up his teammates' 3-point barrage, leading to an important for a young team.
"Our confidence as a team never gets very low," Alexander said. "We know that as a team we have to come out and fight."