Iowa punted on four of its next five drives — the other, the first-half clock ran out — before the Hawkeyes put together their 16-play, 75-yard touchdown drive that overlapped the third and fourth quarters to cut the Sooners' lead to 21-7.
The defense also answered whenever Iowa seemed to gain a sliver of momentum.
After an athletic tip and interception by Iowa defensive lineman Broderick Binns halted at OU scoring chance inside the 10-yard line in the third quarter, the Sooners forced a three-and-out on the Hawkeyes' ensuing drive.
And after the Hawkeyes scored their first touchdown and forced an OU punt, the Sooners answered with another three-and-out. On third down, Vandenberg scrambled to his left, and R.J. Washington pushed him to the turf for the sack.
The Sooners held star receiver Marvin McNutt to just four catches and 46 yards. He came into the game averaging over 105 yards per game.
“He's an NFL-caliber receiver,” Fleming said. “And I want to play at the next level.”