AUSTIN, Texas (Ticker) -- P.J. Tucker helped No. 12 Texas avoid an embarrassing upset behind a superb second half.
Tucker scored 19 of his 21 points after halftime and Daniel Gibson added 19 as Texas needed a late run to post a 100-82 victory over Texas-San Antonio.
Entering the contest with a 50-3 record against intrastate opponents under coach Rick Barnes, the Longhorns were pushed in this one, clinging to a 49-47 halftime lead as Roadrunner reserve Justin Harbert scored 21 points.
"We told the guys about Texas-San Antonio," Texas coach Rick Barnes said. "We have been watching them and knew they would put up a good fight. They are an older group of guys. They don't get rattled. I knew they were going to be one of the better teams we have played yet."
In the second half, Texas-San Antonio (4-5) took a 68-64 advantage when Rapheal Posey made a jumper with 12:52 remaining. Tucker brought Texas back, scoring seven points in a 1:47 span for a 77-71 lead with 10:12 left.
"I had to step up and be a leader to get everyone going," Tucker said. "You can't win a game like this in five or 10 minutes. You have to play the full 40 minutes. Our effort on defense picked up in the second half, but there is still room for a lot of improvement."
The Longhorns (9-2) went on to outscore the Roadrunners, 23-11, over the final 10 minutes to extend their home winning streak against non-conference opponents to 30.
Kenny Taylor scored 13 points, Brad Buckman added 12 and Jason Klotz had eight and seven blocks for Texas, which used its strength inside to separate itself from Texas-San Antonio to post a 47-31 rebounding advantage and score 27 second-chance points.
"Our size inside eventually wore them down," Barnes said. "The younger guys really stepped up."
Along with his scoring, Tucker grabbed nine rebounds - six off the offensive glass - in the second half. Freshman center LeMarcus Aldridge added eight points, five rebounds and three blocks after halftime. Overall, the Longhorns tied a school record with 13 rejections.
Harbert scored 25 points on 10-of-12 shooting and Andre Owens added 16 for the Roadrunners, who fell to 0-5 in the all-time series.
"My teammates helped me a lot by setting good screens which allowed me to get so many (good) shots," Harbert said. "Everyone was getting open."
John Millsap had 14 points and Posey added 12 for Texas-San Antonio, which shot 45 percent (31-of-69).
"(Texas) did what a team at their level is suppose to do," Texas-San Antonio coach Tim Carter said. "They dominated us. They outrebounded us and we couldn't get second-chance shots."