Bettenhausen was a member of a famous racing family and a veteran of open-wheel competition who drove in 21 Indianapolis 500s between 1968 and 1993.
His best finish was third in 1980. He led 138 laps of the 1972 race and was the top qualifier in 1991.
Bettenhausen's father, Tony, also was an Indianapolis 500 veteran who was killed in a practice crash at the speedway in 1961.
