STILLWATER, Okla. -- Kerwin Roach Jr. scored 15 points, all in the second half, and added six rebounds, as Texas closed the game on a 16-2 run to defeat Oklahoma State 62-50 Friday night in the regular season finale for both.
Isaiah Taylor added 12 points for No. 23 Texas (20-11, 11-7 Big 12), which reached the 20-win plateau for the 16th time in the last 17 seasons.
Leyton Hammonds scored 20 points and added six rebounds to lead Oklahoma State (12-19, 3-15), which lost its sixth straight and ninth in its last 10.
After the teams entered the second half tied at 29, neither squad was able to build more than a three-point lead through the first 15 minutes.
Hammonds' long jump shot put the Cowboys ahead 48-46 with 7:44 remaining, but Roach capped off a 6-0 Texas run with a layup to put the Longhorns on top, 52-48, with 4:32 remaining.
Chris Olivier answered for Oklahoma State with 4:11 to go to pull to within 52-50, but that would be the last points for OSU, which made just 5 of 12 free throws in the second half.
Roach sealed the game when he connected on a 3-pointer as the shot clock expired with 1:40 left to make it 60-50.
Oklahoma State jumped out to an early lead, going up 16-11 with 12:20 left in the opening half following Hammonds' basket. The Cowboys missed their next four shots from the floor, and five of six, as the Longhorns reeled off a 13-5 run to seize the advantage, 24-21 with 5:51 remaining.
A 10-foot jump shot by Hammonds with seven seconds left lifted OSU into a 29-29 tie heading into halftime.
Texas: Texas entered the day leading the Big 12 in fewest turnovers per game, averaging 9.8 in conference play, and they committed six on the night, including just one in the first half.
Oklahoma State: It was Senior Night for the Cowboys, and coach Travis Ford started all five seniors on the active roster, including little-used forward Codey McElroy and guard Ford Stuen, who had each made just three appearances for a grand total of nine combined minutes. Also starting were usual reserves Chris Olivier and Anthony Allen. The quartet played the first 2:19 before coming out, with Oklahoma State trailing 5-2, for the usual starters. Neither McElroy nor Stuen saw the court again.
Texas: Big 12 quarterfinals Thursday in Kansas City, Missouri.
Oklahoma State: Kansas State in the first round of the Big 12 tournament on Wednesday in Kansas City.