Conrad Yeatis “Sonny” Clark (July 21, 1931 – January 13, 1963) was an American jazz pianist and composer who mainly worked in the hard bopidiom.

Clark was born and raised in Herminie, Pennsylvania, a coal mining town east of Pittsburgh. His parents were originally from Stone Mountain, Georgia. His miner father, Emery Clark, died of a lung disease two weeks after Sonny was born. Sonny was the youngest of eight children. At age 12, he moved to Pittsburgh. Clark died in New York City on January 13, 1963 (aged 31). The official cause was listed as a heart attack, but the likely cause was a heroin overdose.

https://www.youtube.com/watch?v=Q3HgxCUUiiE