NORMAN — Oklahoma rallied from a double-digit deficit, but lost Aaryn Ellenberg, the lead and, ultimately, the game.
Iowa State won 82-75 in overtime Sunday afternoon inside Lloyd Noble Center, where the Sooners fought hard late but couldn't hang on against the unbeaten Cyclones after Ellenberg fouled out at the end of regulation.
The loss was Oklahoma's second in overtime this season. The Sooners also dropped their Nov. 17 game to Louisville in overtime.
“We have had that experience and we didn't learn from it very well,” said OU coach Sherri Coale.
The Sooners and Cyclones went back-and-forth for much of the first half, with the lead changing nine times, and Iowa State took a 32-30 lead into halftime.
After the break, though, Iowa State took control of the game, leading by as many as 10 points with about six minutes remaining. The Sooners battled back and took their first lead of the second half when senior point guard Morgan Hook drained a 3-pointer with 2:21 on the clock.
With the game tied at 67 and less than 30 seconds remaining, sophomore Sharane Campbell stole the ball from ISU's Nikki Moody and scored to give OU the lead.
But Ellenberg — Oklahoma's leading scorer — picked up her fifth foul with six seconds to go, relegating her to the bench, and Moody's two ensuing free throws sent the game to overtime.
“When you take Ellenberg off the court, that's a big loss for them,” said Iowa State coach Bill Fennelly. “They were a little more searching for offense and that was the biggest difference.”
Entering the extra frame, Oklahoma was shooting 89 percent from the free-throw line, but made only four of its eight foul-shot attempts in overtime.
Iowa State guard Jadda Buckley led all scorers with 29 points on nine of 10 shooting. Buckley made six of the Cyclones' 13 successful 3-point attempts.
Hook matched her career high with 26 points, and Campbell added 16 and nine rebounds.
“This was a measuring stick,” Fennelly said. “When you come here and win, you're doing something right.”
The loss dropped OU to 10-5 and 1-1 Big 12 play this season. OU returns to action Wednesday morning at Texas.
“We have just got to play hard and be hungry,” Campbell said. “There is nothing really to say. We just have to play hard from the get-go and we did not do that today.”