Knox is a rare find indeed. He is the true country boy in the show. Originally from North Carolina, Knox comes from an extremely talented musical family. Knox plays a perfect Luther Perkins, who as everyone knows is Johnny’s original guitar player.. If you love the Johnny Cash sound, come and hear Knox play it and find out why he is such a huge addition to the heart and soul of Johnny Cash Revue. Knox also adds to the background vocals and is the cousin of Joe and Phil.