AUSTIN — Reminisce about some other great Texas-Arkansas game. This one is going down as another early season blowout for the No. 7 Longhorns.

Colt McCoy put up five touchdowns in another near-perfect start, and Texas routed Arkansas 52-10 on Saturday to hand Razorbacks coach Bobby Petrino an embarrassing debut in a border rivalry famous for close games.

The loss was the most lopsided in the series since a 35-point Texas victory in 1970. In the previous 10 meetings between Texas and Arkansas, the average margin of victory was fewer than nine points.

The Longhorns (4-0) have now outscored opponents 198-36 this season — an average margin of victory of 41 points.

McCoy completed 17 of 19 passes and threw three touchdowns, pushing his season total to 14. He also ran for a game-high 84 yards and two scores, the most impressive a 35-yard bolt down the sideline before stumbling in the end zone in the second quarter.

Jordan Shipley caught two touchdown passes for Texas, Quan Crosby hauled in the other and Aaron Williams returned an interception 81 yards for a score.

Arkansas (2-2) was overwhelmed in absorbing a second blowout in as many games to a Top 10 team. No. 8 Alabama crushed the Razorbacks by 35 points last week, and the road doesn't get easier for Arkansas and Petrino.

The Razorbacks next games is against No. 4 Florida, coming off a loss to Mississippi and former Arkansas coach Houston Nutt, an upset sure to further sour Razorbacks fans Saturday.

After that the Razorbacks will face Auburn. The Longhorns, meanwhile, will play their Big 12 opener next week at Colorado before their pivotal meeting with the No. 2 Oklahoma in Dallas.

The game was played two weeks after the threat of Hurricane Ike postponed the 77th meeting between the schools. Arkansas probably wished it was pushed back even more.

Texas allowed its fewest points this season and held the Razorbacks to 174 total yards. Casey Dick completed 7 of 13 passes for 138 yards for Arkansas, and Michael Smith struggled to pick up 42 yards on 13 carries.

Arkansas didn't reach the end zone until late in the fourth when Antwain Robinson scooped up a fumble and returned it 80 yards for a touchdown.

Shipley caught eight passes for 83 yards and got his fifth and sixth touchdown catches of the year. Crosby caught his third touchdown of the year on a 13-yard pass in which Arkansas was flagged for pass interference — another sign that McCoy could do no wrong.

McCoy, who broke the Texas school record for passing touchdown last week against Rice, now has 65 in this three seasons. The game also marked the third time this year he led the Longhorns in rushing.