Restless Heart Restless Heart is an American country music band established in 1984. The band's longest-lasting lineup has consisted of Larry Stewart (lead vocals), John Dittrich (drums, background vocals), Paul Gregg (bass guitar, background vocals), Dave Innis (piano, keyboards, rhythm guitar, background vocals), and Greg Jennings (lead guitar, mandolin, background vocals). Verlon Thompson was the band's original lead singer, but he was replaced by Stewart before the band signed to RCA Records Nashville. Stewart departed for a solo career in 1992; during this time, Innis, Gregg, and Dittrich alternated as lead vocalists, until Innis also left. The band was on hiatus from 1994 to 1998. During this hiatus, Dittrich briefly recorded as one-third of The Buffalo Club, and Jennings joined Vince Gill's road band. Stewart, Gregg, Dittrich, and Jennings reunited briefly in 1998 to record new material for a greatest hits album; they, along with Innis, reunited again in 2004, and this lineup has remained ever since.