Parry O’Brien revolutionized the shot putting competition in the early 50s when he begin spinning 180° before loosing the shot. He broke the world record 17 times in total, and won 2 gold medals and a silver medal over 12 years. He retired from athletic competition in 1966, but was still in shape and active. He had a heart attack while competing in a masters 500-meter freestyle swim meet on Saturday.

(Source: ESPN.com)