Iowa State football coach Gene Chizik’s first game against his former team was decided almost as soon as it began.

The Longhorns (5-2, 1-2 Big 12) scored on their first play from scrimmage Saturday in Jack Trice Stadium and dominated through four quarters, winning 56-3, leading 28-3 at halftime and 42-3 less than five minutes into the second half.

Texas ran seven straight passing plays to start the game and picked apart the Cyclone secondary. Colt McCoy threw for 298 yards and four touchdowns, including a 58-yarder less than three minutes into the first quarter. McCoy was 23 of 30 passing and ran for a touchdown.

On the first possession of the second half, McCoy capped a 10-play drive with a 20-yard touchdown pass. Pressure by the Cyclone front sent him stumbling through the crowded pocket, but McCoy posted his hand, spun, controlled his momentum and looked upfield, finding Nate Jones for a 20-yard touchdown. Texas’ Brandon Foster intercepted a Bret Meyer pass on the following possession and returned it 39 yards for a touchdown.

With three minutes left in the third, McCoy escaped a collapsing pocket and ran almost 44 yards untouched for a touchdown to increase the Longhorn lead to 49-3.

By then, more than half of an announced crowd of 52,060 remained had filed out of Jack Trice by the end of the third quarter.

Iowa State played mostly reserves in the fourth.

In the first half, the Cyclones (1-6, 0-3 Big 12) drove inside the Texas 20-yard line, but came away with only three points.

Kicker Bret Culbertson missed a 30-yard field goal wide right on the team’s second possession of the game, but knocked down a 25-yarder early in the second quarter.

Meyer was 17 of 34 in the game for 111 yards and two interceptions.