AMES, Iowa (AP) — Iowa State managed to win on Tuesday, but coach Fred Hoiberg was still disappointed.

The Cyclones trailed Yale for most of their New Year's Day game, finally pulling away for an 80-70 victory — Iowa State's 15th straight at Hilton Coliseum.

Hoiberg said his team — playing its first game in 13 days — lacked intensity while falling behind by as many as 12 points to the physical Bulldogs.

"You shouldn't have to coach energy, but we've had to the last couple games," Hoiberg said.

Will Clyburn scored 14 of his game-high 17 points in the second half as Iowa State (10-3) survived. His three-point play fueled a 17-5 second-half run for the Cyclones, who open Big 12 Conference play Jan. 9 at sixth-ranked Kansas.

"We played Iowa State basketball in the second half," said Clyburn, a senior who added six rebounds and four assists. "We played together. The first half, it wasn't us."

The Cyclones converted just one of their first seven field-goal tries and two of their first seven from the free-throw line as Yale led nearly the entire first half. Iowa State shot 25.9 percent and trailed 35-27 at halftime.

Iowa State committed three turnovers in the game's first four minutes.

"So disappointed in the way we came out of the gate," Cyclones coach Fred Hoiberg said. "We did it the last game as well. The frustrating thing for me is just how capable we are as a team when we're doing things the right way. You can't go out there and let a team hang around."

Yale (4-10) did more than hang around, breaking a tie with a 10-3 run finished by Armani Cotton's 3-pointer with 8:38 left in the first half for a 22-15 lead.

The Bulldogs pushed the lead to 35-23 late in the first half on Austin Morgan's 3-pointer and maintained an advantage until Tyrus McGee's 3-pointer put the Cyclones ahead 58-55 with 8:39 to play.

"They're physical, they're strong," Hoiberg said of the Bulldogs. "They're going to pound us in the glass and they did all those things, but we allowed it to happen and that's unacceptable."

The Cyclones finally sealed the win with a 7-0 spurt inside the 5-minute mark. In contrast to the first half, they committed three turnovers after halftime, while scoring 53 points on 50 percent shooting.

"We showed what we're capable of doing when we play the right way," Hoiberg said.

Jeremiah Kreisberg led Yale (4-10) with 16 points and Javier Duren scored 12 for the Bulldogs.

Iowa State, which entered the game seventh in the nation in rebounds per game, managed a 42-39 edge on the boards.

"They came out real aggressive," said Iowa State forward Georges Niang, who scored 14 points while grabbing five rebounds. "They caught us off guard in the beginning; then we had to go back to the drawing board and get back at them."

McGee also scored 14 points off the bench for Iowa State. Six Cyclones scored in double figures and Melvin Ejim had a game-high 11 rebounds.

Iowa State racked up 53 second-half points and shot 50 percent after halftime.

"We showed what we're capable of doing when we play the right way," Hoiberg said.

The Cyclones finally sealed the win with a 7-0 spurt within the final 5 minutes. They committed three turnovers in the second half and nine total — their second-lowest output of the season.

"If we play like we did in the last 15 minutes we'll be fine," Hoiberg said.

But the Jayhawks loom next and the coach reiterated a partial performance won't be enough.

"I'm very disappointed in the way we played," Hoiberg said. "If we play like this throughout conference play we may be done winning. It just can't happen."