Michael Mario Andretti is an American former racing driver, and current team owner. Statistically one of the most successful drivers in the history of American open-wheel car racing, Andretti won the 1991 CART championship, and amassed 42 race victories, the most in the CART era and fifth-most all time. Since his retirement, Andretti has owned Andretti Autosport, which has won four IndyCar Series championships and five Indianapolis 500 races. He is the son of Mario Andretti, a multi-time champion, and is the father of IndyCar Series driver Marco Andretti.