AMES, Iowa - Georges Niang had 20 of his 23 points in the second half and No. 17 Iowa State rallied from a 21-point deficit Monday night to stun No. 15 Oklahoma 77-70 to snap a two-game losing streak.
Monte Morris had 19 points for the Cyclones (21-8, 11-6 Big 12), who maintained their shot at a share of the conference title following one of the wilder league games in years.
Oklahoma raced to a 19-point halftime lead. But Iowa State score 22 straight points in just over 5 minutes and outscored the Sooners 59-33 in the second half.
Buddy Hield had 26 points for the Sooners (20-9, 11-6), who shot just 32 percent in the second half in losing for just the second time in 10 games.
Oklahoma had survived scares in its last three games, needing overtime to beat Texas Tech and rallying past Texas and TCU for narrow wins.
The Sooners looked as though they had the Cyclones buried by halftime.
Oklahoma dominated the offensive glass, forced Iowa State to turn it over 10 times in 15 minutes and jumped ahead 37-18. It was a stunning score considering that the Cyclones had won 21 straight home games before last week's loss to Baylor.
But Isaiah Cousins was given a technical foul following a block by teammate Ryan Spangler with Oklahoma ahead 48-28 - and that seemed to spark the Cyclones.
Their furious run was capped by a 3-pointer from Dustin Hogue that put Iowa State ahead 50-48 with 9:33 left.
The Cyclones kept pushing, and Niang's 3 gave them a 59-52 lead with 6:43 left.