Iowa State’s turnaround was stunning. So was Iowa’s, though for completely different reasons.

A week after struggling to beat Division I-AA Illinois State, Iowa State played inspired defense and capitalized on turnovers for all its points to shock No. 8 Iowa, 23-3, Saturday and end the Hawkeyes’ nine-game winning streak.

Iowa State (2-0) frustrated Iowa (1-1) throughout the steamy afternoon, recovering three fumbles and intercepting two passes, one of which LaMarcus Hicks returned 28 yards for a touchdown.

Iowa had scored with ease in a 56-0 rout of Ball State in its opener, but the Hawkeyes were so inept offensively in this one that they never got closer to the end zone than the Iowa State 26.

“We had to be one of the most improved teams in the country from week one to week two if we were going to have a chance,” Iowa State coach Dan McCarney said. “That’s the way we played today.”

It was Iowa State’s first victory over a Top 10 team under McCarney, the coach since 1995, and the first for the school since a 19-10 victory over No. 7 Nebraska in 1992.

“It’s been a long time coming,” McCarney said. “It’s about time, I guess.”

Iowa got 140 yards rushing on 18 carries from Albert Young but had little else going. The Hawkeyes’ lone score was a 44-yard field goal by Kyle Schlicher in the third quarter.

No. 18 Oklahoma 31, Tulsa 15

Norman, Okla. – Adrian Peterson ran for 220 yards and three touchdowns and made Oklahoma’s passing game unnecessary as the Sooners avoided a second stunning loss.

With new starter Rhett Bomar struggling at quarterback, OU (1-1) didn’t attempt a pass in the second half.

No. 21 Texas Tech 56, Florida International 3

Lubbock, Texas – Cody Hodges threw for 454 yards and four touchdowns and ran for another to lead Texas Tech.

Hodges, the third straight fifth-year senior to start for Tech (1-0), connected on TD passes of 47, 39, 38 and seven yards.