About Bill Black
William Patton Black Jr. was an American musician and bandleader who is noted as one of the pioneers of rock and roll. He played in Elvis Presley's early trio, the Blue Moon Boys. Black later formed Bill Black's Combo. On July 5, 1954, the trio met at Sun studios to rehearse and record a handful of songs. In July 1954, Sam Phillips, of Sun Records, asked Black and Moore to play backup for the as-yet-unknown Elvis Presley.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.