High Quality Content by WIKIPEDIA articles! Marco Michael Andretti (born March 13, 1987) is an Italian American auto racing driver who drives the #26 car for Andretti Autosport in the IndyCar Series. He is the son of 1991 IndyCar World Series champion Michael Andretti and the grandson of racing legend Mario Andretti. In his rookie year, he finished second in the 2006 Indianapolis 500 in the second closest finish in the race`s history.