Mark O'Connor is an Amercian bluegrass singer who performed the song Restless with The New Nashville Cats.
 The song became a major hit again in 1991 in a new all-star recording by Mark O'Connor and The New Nashville Cats. 
Mark O'Connor (born August 5, 1961, Seattle) is an American bluegrass, jazz and country violinist, fiddler, composer and music teacher. 
