What driver swept these races?

Today’s question: It is hard in today’s world to be able to race more than one type of car. Who was the first driver to win the Indy 500, the Daytona 500, and the 24 Hours of LeMans in their career?

Yesterday’s answer: Chariots of Fire: Harold Abrahams was one of the first British Olympic champions of Jewish descent. His story is part of the Academy Award winning film “Chariots of Fire.” Abrahams was both a sprinter and a long jumper, and was well known for his daily rigorous training program. This film gives a wonderful look into the difficulties and persistence required by an athlete to become and Olympic champion. He won the gold medal at the 1924 Paris Olympics.