Penske's Keselowski, Hornish return

DAYTONA BEACH, Fla. -- Two of the three cars owned by Roger Penske wrecked in NASCAR's season-opening Daytona 500, although they both returned several laps down.

A six-car accident on the seventh lap of Sunday's race collected Penske drivers Brad Keselowski and Sam Hornish Jr. The accident began when Keselowski had a problem with a tire and lost control of his Dodge.

"I must have run over something with the right rear tire," Keselowski said.

"I blew a tire going into Turn 1 and the car just took off," he said. "The tire just exploded and took the right-rear quarter panel out. It's a shame. You come here, work hard for two weeks trying to put a car together to do everything right, you study tapes, make all the right moves in the race and we only make six laps."

Keselowski was 34 laps down when he returned to the track, and Hornish was 48 behind. Penske Racing still had Kurt Busch in the field, and he had led several times.

The accident also collected Max Papis, Mike Bliss, Boris Said and Regan Smith.

It was the third race this weekend at Daytona International Speedway that has opened with a multi-car accident. The Truck Series race Saturday night had a nine-truck wreck on the first lap, and a later 10-truck accident.

Dale Earnhardt Jr. was involved in a spectacular upside down wreck in the Nationwide race, and Danica Patrick was caught up in another wreck during that race.