LAWRENCE, Kansas— Iowa State was minutes away from sweeping No. 9 Kansas in the season series.

With 16 minutes to play Monday night, the Cyclones held an eight-point lead at Allen Fieldhouse. But costly turnovers and a porous defense let Kansas back in the game, and the Jayhawks took advantage, pulling away for an 80-76 win.

Iowa State (14-5, 4-3 Big 12) led by five at halftime thanks to six made 3-pointers. But when the second half rolled around, coach Steve Prohm’s squad couldn’t keep the momentum going.

“They got us a little frustrated,” Prohm said. “At the end of the day, we didn’t do a good enough job guarding the dribble.

“It’s a frustrating, disappointing loss.”

The Cyclones jumped out to an eight-point lead quickly after the start of the half, but the offense went cold at the wrong time.

From the 12:44 mark of the second half until the 7:27 mark, the Cyclones were held scoreless. A 53-47 lead evaporated and was quickly turned into a 61-53 Kansas lead.

“I was saying we were gonna get it right back,” said freshman Talen Horton-Tucker, who finished with 16 points (6-of-15 shooting). “You’ve gotta stay positive through those things.”

Iowa State couldn’t hit a shot. The Cyclones missed open looks, turned the ball over and got back late on defense.

“They controlled the game and we just kind of hung in there,” said Kansas coach Bill Self. “They were definitely in control … we go from down six to up eight and that was enough to get us to the finish line.”

Iowa State redshirt senior Marial Shayok led the Cyclones with 26 points (9-of-18 shooting). But for a 10-minute period in the second half, he was held to just three points as the Jayhawks’ defense stifled him and forced the rest of the team to carry the load.

“It’s something we gotta learn from and get better from down the road for sure,” Shayok said. “I think a little bit of our youth came in today. It’s better to have that now than in the conference tournament so we’re just going to learn from this.”

Iowa State fought back after blowing the lead, tying the game at 69 with 2:29 to play thanks to a 3-pointer from redshirt junior Michael Jacobson, who finished with 12 points and 11 rebounds.

The nail in the coffin for the Cyclones came with less than two minutes left.

With Kansas leading by one, the Jayhawks missed a layup at the rim. Iowa State sophomore guard Lindell Wigginton rebounded and drove into the lane on a 3-on-2 fastbreak. He fired a no-look pass to the corner, expecting freshman guard Tyrese Haliburton to drift there and be ready for a 3-pointer.

Haliburton stayed on the wing. The pass sailed out of bounds.

Just like that, Iowa State’s chance to take a lead in the final 90 seconds was gone.

Kansas hit free throws down the stretch, outscoring Shayok, who hit bucket after bucket to keep the Cyclones in the game.

With the loss, Iowa State sits at 4-3 in Big 12 play. The Cyclones split the season series with Kansas.

The last 12 games in the series between Iowa State and Kansas are now split at six wins apiece. Barring a matchup in the Big 12 Tournament or the NCAA Tournament, the rivalry will be at a stalemate until 2020.

“I’m glad that we don’t play the Cyclones again,” Self said.