IOWA CITY, Iowa (AP) -- Iowa came out sluggish, lacking the fire that fueled the Hawkeyes (No. 17 ESPN/USA Today, No. 18 AP) in games earlier in the week against highly ranked Kentucky and Texas.
Then Jeff Horner provided the spark, hitting a long jumper that propelled Iowa to a 12-0 run late in the first half. His teammates and a swarming defense took over from there, leading Iowa to a 79-46 victory over Texas San Antonio on Saturday.
"We came out a little flat," said Adam Haluska, who led the Hawkeyes with 15 points and seven rebounds. "The coaches definitely saw it, and we saw it. We were just standing around waiting for something to happen. I think we learned we can't really play to the level of the competition."
The Hawkeyes (4-1) wasted no time putting the game away in the second half.
Alex Thompson's 3-pointer gave Iowa a 20-point lead at the 13:40 mark. Five minutes later, Carlton Reed stepped in front of a pass and drove the floor for a layup that extended Iowa's lead to 65-37 and sent the Hawkeyes starters to the bench.
The victory capped a week in which the Hawkeyes beat Kentucky (No. 7 ESPN/USA Today, No. 8 AP) and lost in the final minutes to second-ranked Texas in the title game of the Guardians Classic.
Horner, who struggled in the tournament, finally got on track by scoring 13 points. Greg Brunner had 14 points and Alex Thompson came off the bench to add 11 for the Hawkeyes, who shot 53 percent in the second half and 47 percent for the game.
Texas-San Antonio (2-1), starting two freshmen and a sophomore, was led by Andre Owens' 15 points. Gabe Bernard came off the bench to score 11 points.
But the Roadrunners struggled with their perimeter shooting and made too many mistakes. The Roadrunners shot 36 percent and committed 23 turnovers that led to 25 Iowa points.
Texas-San Antonio coach Tim Carter said his team was simply outmatched by Iowa's veterans and physical play.
Iowa "is too good of a ballclub to play passive and think you're going to have a shot in the ballgame," Carter said. "This is probably the youngest team we've had in 11 years. We had that deer-in-the-headlight look in their eyes out there."
The game was close early, with the teams tied twice, trading leads three times and Iowa's lead never reaching beyond six points. But Horner's jumper from just inside the 3-point line helped Iowa break away and build a 36-21 at the break.
Iowa coach Steve Alford said he was satisfied with the result but disappointed with his team's lackluster attitude during critical moments in the game.
"We did a lot of good things. All in all, I'm pretty pleased with our defense," Alford said. "But just the approach of trying to knock somebody out -- we've got to get that mentality."