He joined his brothers' band in 1973. By that time, the Isley Brothers had established themselves with hits like 1959's "Shout," which sold more than 1 million records. Isley splintered off to form Isley-Jasper-Isley in the 1980s and returned to the Isley Brothers in the 1990s. The group was inducted into the Rock and Roll Hall of Fame in 1992, and their career has spanned six decades.