Dodge Schwartzburg kicked four field goals and Wayne Ziegler scored on a 63-yard interception return, leading Kansas, a 28-point underdog, to a 28-11 upset of second-ranked Oklahoma today.

The Jayhawks took a 7-3 lead on Lynn Williams' one-yard run early in the second quarter -- the second rushing touchdown allowed by Oklahoma this season -- and never again trailed the previously unbeaten Sooners.

According to Oklahoma Coach Barry Switzer, the victory went to the most deserving team. "I have to say congratulations to Kansas. We didn't deserve to win -- in no way," he said. "Our inability to move the football was obvious."

Kansas quarterback Mike Norseth passed for 152 yards and Williams rushed for 76 yards against the nation's No. 1-rated defense as Kansas improved its record to 3-5 overall and 2-2 in the Big Eight Conference.

Oklahoma (5-1-1) was forced to start a freshman quarterback for the first time since World War II because of an ankle injury to senior Danny Bradley the previous week. Reserve Troy Aikman threw three interceptions.

"It's a terrible situation to put a young man in," Switzer said. "The boy was scared to death. It's not all his fault -- not at all."

Aikman wound up with two completions in 14 attempts for eight yards.

The Sooners' offense never got untracked, making only five first downs in the first half, none in the second period. Their only points of the half came on Tim Lasher's 22-yard field goal on the Sooners' first possession, on which they covered 50 yards on 13 running plays.

Kansas, which yielded 47 points to Oklahoma State a week ago, entered the game as the 90th-rated defense in the country.

Norseth set up Kansas' first touchdown with a 54-yard completion to Tom Quick to the Oklahoma one in the second period and completed five straight passes in the second-quarter drive which led to Schwartzburg's first field goal.

A 28-yard punt by Mike Winchester gave Kansas the ball back at the Sooners' 49. The Jayhawks then used two shuffle passes from Norseth to freshman Mike Rogers to gain 27 yards before Schwartzburg's 29-yard kick gave them a 10-3 lead that stood up through the half.

The victory was Kansas' first over Oklahoma since 1975 and the first time they have beaten the Sooners in Lawrence since 1964.

Oklahoma wingback Steve Sewell fumbled on a reverse at his own six late in the third quarter and it was recovered by Guy Gamble, setting up Schwartzburg's 19-yard field goal that gave the Jayhawks a 13-3 lead.

Kansas earned a two-point safety four plays into the fourth quarter when Milton Garner blocked a punt through the Oklahoma end zone.

The Jayhawks were leading, 15-3, when Ziegler made his 63-yard interception return. Two Oklahoma players lunged at Ziegler's ankles as the safety neared the end zone but could not prevent his first career touchdown.

Schwartzburg's third three-pointer -- a career-record 45-yarder -- was set up by Aikman's third interception. His fourth field goal, a 31-yarder, was made possible when Jon Stewart recovered Spencer Tillman's fourth-period fumble at the Oklahoma 17.

Oklahoma reserve quarterback Kyle Irvin scored on a one-yard plunge and added a two-point conversion with three seconds remaining.