Chapman would later become a member of one of the Coasters' many spin-off groups, The Coasters Mark II, which included Bobby Nunn, Bobby Sheen, and Billy Richards, Jr. In 1977, along with Billy Guy and Jerome Evans, he sang on "Paid The Price" on Michelle Phillips' album Victim Of Romance. Chapman would also substitute for Carl Gardner a few times in the 1990s and 2000s with The Coasters.
Later, Chapman became a part of one of The Coasters' many spin-off groups, The Coasters Mark II, alongside Bobby Nunn, Bobby Sheen, and Billy Richards, Jr. In 1977, he collaborated with Billy Guy and Jerome Evans on the song "Paid The Price" for Michelle Phillips' album Victim Of Romance. Chapman also temporarily replaced Carl Gardner in the 1990s and 2000s with The Coasters.