Having forged his reputation in two singing groups, the Swallows and the Flyers, Hendricks joined the Drifters in 1958, but left for a solo career the same year. ‘Itchy Twitchy Feeling’, on which he was backed by the Coasters, gave Hendricks a US Top 30 pop hit, but he was unable to secure a consistent profile. He briefly entered the lower regions of the US pop charts in 1960 with ‘Psycho’. Hendricks rejoined the Drifters in 1964.