The forward also led his squad with 18 points, giving No. 7 Texas (20-3, 8-1) its seventh straight 20-win season.
C LaMarcus Aldridge, plagued by foul trouble last game vs. Texas A&M, bounced back Monday night with 17 points and 11 boards and now holds claim to 11 double-doubles this season.
While the Texas big men carried the weight, the Longhorns also got assistance from G Kenton Paulino, who continued his stretch of controlling the game from the point by tacking on 10 points and four assists.
The Texas zone defense stifled Texas Tech (12-11, 4-5) all night, holding the Red Raiders to just 16-of-50 (32.0 percent) shooting from the floor, while the Horns shot 26-of-60 (43.3 percent) on the night. G Jarrius Jackson came into the matchup as the Raiders leading scorer but finished with just 14 points and finished as just one of two Tech players to score in double figures.
Texas dominated in the paint and out-rebounded Tech 50-22 largely due to Tucker and Aldridges governing down low. Three-point shooting proved to be UT's only weak spot, as the Horns shot just 4-of-17 (23.5 percent) from behind the arc. G Daniel Gibson, Texas top sharp shooter, converted only 2-of-8 from long range and finished with eight points.
The game remained tight for the first five minutes until Tucker broke the 7-7 tie with two free throws and a pair of field goals. G A.J. Abrams then stole a pass and drove the length of the court for a quick lay up, starting a 12-6 Texas run. After Tucker drove to the basket for two points and Aldridge drained a jumper, the Horns went into the break with 11 points of breathing room.
Paulino began the second half with a lay up and assisted F Brad Buckman on his jump shot on the next play, but the Red Raiders answered with an 8-2 run until Paulino broke the streak with a three pointer and two-point jumper to bring the lead back to 14 points with 15 minutes remaining. Buckman went on to finish with eight points.
The lead hovered around 14 points for the next few minutes until the home team inched within 11 points at the nine-minute mark. From then on, though, Texas put the nails in the coffin with a 9-0 run capped off with an Aldridge lay up.
Texas gave up just two baskets in the final nine minutes, and Tucker sealed the night by taking a Gibson pass to the lane for two points, giving the Horns the 21-point victory.
Texas goes for win No. 21 on Saturday at 3 p.m. in the Erwin Center vs. Nebraska.