Clark was leading when he retired from the 1964 event with suspension failure, but in 1965, he won the biggest prize in US racing driving his Lotus 38 and winning by a lap; it was the first mid-engined car to win the Indianapolis 500.
Clark era líder cando se retirou da carreira de 1964 cun fallo na suspensión, pero en 1965, gañou o premio máis grande nas carreiras dos Estados Unidos ao volante do seu Lotus 38 e gañar por unha volta; foi o primeiro coche con motor central que gañou as 500 Millas de Indianapolis.