Race drivers Marco Andretti, left, and Danica Patrick wait for the start of practice on the final day of qualifications...

In this May 10, 2008 file photo, race driver Marco Andretti, left, his father and car owner Michael Andretti, right, and his grandfather Mario Andretti talk in...

IRL driver Marco Andretti raises the winner's trophy after winning the Indy Grand Prix of Sonoma Sunday, Aug. 27...

The car of IRL driver Marco Andretti breaks apart as he hits the wall after colliding with Ryan Briscoe at the IndyCar Series...

...Target Chip Ganassi Racing Dallara Honda celebrates with second placed Helio Castrones (L) and third placed Marco Andretti (R) after winning the IndyCar Series Meijer Indy 300 on August 9, 2008 at the Kentucky...

Driver Marco Andretti, left, talks with his grandfather, Mario Andretti, on pit row during the morning practice for the...

FORT WORTH, TX - JUNE 06: Marco Andretti, driver of the #26 Blockbuster Andretti Green Racing Dallara Honda, leads Danica Patrick driver of the...

Jun. 22, 2008; Newton, IA, USA; IRL driver Marco Andretti pits during the Iowa Corn Indy 250 at the Iowa Speedway

Andretti Green racing teammates Marco Andretti, left, and Tony Kanaan, of Brazil, talk in the pit area during practice for...

Marco Andretti, left, and Ryan Hunter-Reay collide in the closing laps of the IRL Bombardier Learjet 550...

CAPTION: May 10, 2008; Indianapolis, IN, USA; IRL driver Marco Andretti looks on with teammate Danica Patrick near the end of qualifying for the 92nd running of...

Marco Andretti makes a pit stop during the 92nd running of the Indianapolis 500 auto race at the...

Marco Andretti runs in front of Ryan Briscoe, of Australia, and Tomas Scheckter, rear, of South Africa, during...

...auto race, at the Indianapolis Motor Speedway on Sunday, May 28, 2006, in Indianapolis. Hornish passed Marco Andretti in the closing seconds of the race to take the win. (AP Photo/Darron Cummings

Marco Andretti