FONTANA, Calif. (AP) _ Arie Luyendyk, a late addition to the Marlboro 500 field, suffered a concussion in a crash Sunday after German rookie Arnd Meier spun in front of him.

Luyendyk, who has driven the last two seasons in the Indy Racing League and won this year's Indianapolis 500, was momentarily unconscious after the crash in turn four on lap 41.

Later, he was awake and talking, and complained of no other injuries.

Luyendyk was taken to Loma Linda Medical Center for a CAT scan and precautionary X-rays. He was to be kept overnight for observation.

Meier spun in front of Luyendyk, who was running 18th at the time. He smacked Meier's car and then hit the wall hard.

Meier complained of soreness in his head and neck. He received physical therapy at the California Speedway's care center.

Luyendyk was called in from his Scottsdale, Ariz., home after Alex Zanardi crashed both of his cars in practice Friday and received a mild concussion.

Luyendyk arrived too late to qualify, so he started in Jimmy Vasser's backup car at the rear of the fastest field in auto racing history.