AMES, Iowa — Chris Brown ran for two second-half touchdowns and No. 4Oklahoma survived a major scare from Iowa State, beating the Cyclones 17-7Saturday.

D.J. Wolfe’s end-zone interception midway through the fourth quarter helpedturn the tide for the Sooners (7-1, 3-1 Big 12), who won at Iowa State for the20th straight time.

It wasn’t easy.

Oklahoma, which was stunned by Colorado 27-24 in its only other Big 12 roadgame, committed three turnovers and didn’t take the lead until the fourthquarter.

The Sooners nearly gave it back.

Iowa State (1-7, 0-4), aided by a shanked punt, drove to the Oklahoma 8 with7:24 left, where Bret Meyer converted a fourthth-and-1. However, Wolfe grabbed atipped pass from Meyer to keep Iowa State from tying the game.

The Cyclones forced Oklahoma into a forurth-and-4 with 3:02 left, but SamBradford found Jermaine Gresham for a 14-yard reception. Garrett Hartley sealedthe win with a 43-yard field goal with 1:38 left.

Down 7-0 at the break, Oklahoma came out for the second half intent onrunning it down Iowa State’s throat. Demarco Murray picked up three first downson the ground, and Brown capped the drive with an 8-yard TD run to tie the gameat 7 with 8:35 left in the third quarter.

Bradford seemed to have trouble with a 15-mph wind at his back, as passafter pass sailed by Oklahoma’s wideouts. But Gresham went 30 yards on a screenpass on the final play of the third quarter, and Brown gave Oklahoma its firstlead, 14-7, on a 4-yard TD run.