In 1955, Bruce Tate left the group. He was replaced by Randy Jones (who would later sing with the Cadets). During the summer of 1956, Jones and Tisby were briefly out of the group, and were replaced by Ray Brewster and Teddy Harper, respectively. Jones and Tisby returned shortly afterwards. Curtis Williams left in December 1957, with Harper rejoining as his permanent replacement. The Penguins never had another national hit, but their 1957 cover of "Pledge of Love" reached No. 15 on the R&B chart.
In 1955, Bruce Tate left the group. He was replaced by Randy Jones (who would later sing with the Cadets). During the summer of 1956, Jones and Tisby were briefly out of the group, and were replaced by Ray Brewster and Teddy Harper, respectively. Jones and Tisby returned shortly afterwards. Curtis Williams left in December 1957, with Harper rejoining as his permanent replacement. The Penguins never had another national hit, but their 1957 cover of "Pledge of Love" reached No. 15 on the R&B chart.