Al Unser Sr. raced his way into the record books with four Indy 500 wins, as well as becoming the oldest person to win the race when he did so in 1987, five days before his 48th birthday. His incredible career started in 1957 at age 18 when he began racing modifieds. In 1965 he found his way into his first Indy 500, a race he first won five years later. He would win a USAC National Championship, a 1978 Triple Crown of Ovals – IndyCar Championship, and was crowned PPG IndyCar World Series Champion in 1983 and 1985. After being unable to qualify for his 28th Indy 500 he announced his retirement from racing on this day in 1994, just shy of his 55th birthday.