AMES, Iowa (AP) -- Kansas (No. 11 ESPN/USA Today, No. 12 AP) had the size, the depth and the national ranking. On this day, though, none of that mattered.

Iowa State stood in against the taller Jayhawks from start to finish and got a strong second half from Marcus Fizer in beating Kansas 74-66 Saturday to stay in first place in the Big 12.

	Iowa State's Stevie Johnson outhustles Kansas Luke Axtell as the two chase a loose ball Saturday.

Fizer scored 15 of his 19 points in the final half and Iowa State overcame terrible shooting with rebounding and tough defense to subdue the Jayhawks before a roaring crowd of 14,092.

"I just thought it was a slugfest," Iowa State coach Larry Eustachy said. "I thought it was a boxing match. Every time we were in the huddle, we were saying OK, it's the 11th round, we've got one more to go. Let's just stay with it."

Iowa State (18-3, 6-1 Big 12) went ahead for good with a 9-0 run in the second half and stayed in control down the stretch with its defense and sharp free-throw shooting.

Kansas (16-4, 5-2) led by as many as five points in the second half before enduring two long stretches without a basket.

"Everything looks better when you shoot the ball in the hole," Kansas coach Roy Williams said. "But we didn't shoot it in and we haven't shot it in for a while."

It was Iowa State's first victory over a ranked team since beating No. 10 Cincinnati on March 15, 1997 in the NCAA tournament. But the Cyclones were not clamoring for their own spot in the Top 25.

"I don't think we've earned anything yet," forward Paul Shirley said. "This is a tough league and we've just got to keep going. We've got another game coming up Wednesday against Kansas State and they'll be fired up because we beat them down there."

Kansas was leading 46-41 when Iowa State began to assert itself. Jamaal Tinsley hit a 3-pointer and a turnaround shot on the baseline to start a run of nine straight points that gave Iowa State a 50-46 lead with 13:34 left.

During that stretch, Kansas missed six shots and turned the ball over four times.

"Every time there was a loose ball, they picked it up and ended up scoring," Williams said. "They were just quicker to the ball."

Kansas still managed to hang around and trailed 56-55 after Kirk Hinrich's 3 from the top of the key with 8:26 to play. But Iowa State, which shot only 31.8 percent, answered quickly.

Fizer, who sat out the final 8:26 of the first half after getting his third foul, hit a one-hander from the baseline and then nailed a 3-pointer -- just his fifth of the season -- to make it 61-55. After Nick Collison scored for Kansas, Fizer sank two free throws and Kantrail Horton made a pair for a 65-57 lead with 3:55 to play.

Though Fizer's 3 with 7:41 left was Iowa State's last basket, the Cyclones closed the game by making 13 of 16 free throws. Kansas went without a basket from the time Collison scored with 6:52 left until he hit a 3-pointer with 1:03 to play.

"I think we panicked a little bit," Hinrich said. "I think that's what it was -- panic."

Michael Nurse added 16 points for Iowa State, which has only two players as tall as 6-feet-8: Fizer and Shirley. Tinsley had 12 points, Horton 11 and Shirley 10. Iowa State outrebounded Kansas 42-41 and got 18 offensive rebounds.

"I don't think we did a sparkling job (inside), but we held our own," Shirley said.

Eric Chenowith led Kansas with 16 points and had six of the Jayhawks' 13 blocks. Collison scored 15.

As expected, many in the crowd booed Collison and Hinrich, both former high school stars in Iowa playing in their home state for the first time in college. Hinrich scored eight points.

"I really couldn't care less about the boos or what people think of me back here," Collison said. "But it just hurts to lose this game."