He attended DeWitt Clinton High School in New York City and studied guitar.

[2][3] From 1957, he was a member of a rhythm and blues band led by King Curtis.

[2][3] Four years later he dropped out of music, though he returned in the 1970s to record with Helen Humes and Jay McShann.

Another absence followed until 1981, when he returned to music to play with the Harlem Blues and Jazz Band.

[2][3][4] During his career, Casey worked with Louis Armstrong, Chu Berry, Coleman Hawkins, Lionel Hampton, Billie Holiday, Billy Kyle, Frankie Newton, Clarence Profit, Art Tatum, and Teddy Wilson.