Unser won the Indy 500 in 1970, 1971, 1978 and 1987. He's also the only driver with both a sibling and a child who also won the 500. His namesake son, Al Unser Jr., is a two-time winner.

3. Al Unser Sr. Unser isn't just tied for the most Indy 500 wins, claiming his four in 1970, 1971, 1978 and 1987.

Unser won the Indy 500 in 1970, 1971, 1978 and 1987. He's also the only driver with both a sibling and a child who also won the 500. His namesake son, Al Unser Jr., is a two-time winner.

Unser won the Indy 500 in 1970, 1971, 1978 and 1987. He's also the only driver with both a sibling and a child who also won the 500. His namesake son, Al Unser Jr., is a two-time winner.