Mark W. Winchester: bio Mark W. Winchester, singer, hit songwriter, accomplished and award winning upright bass player, combines all his talent and experience as a performer to bring his own unique brand of entertainment to the musical stage. Mark W. landed in Nashville in 1987 and became a founding member of the Planet Rockers, forerunners of Nashville's roots rock revival. The Planet Rockers(which also included the legendary Sonny George and Los Straitjackets' Eddie Angel) remain rockabilly cult favorites. Following his run with The Planet Rockers, Emmylou Harris enlisted Mark W. to "slap" the upright bass in her Grammy Award-winning all acoustic band, the Nash Ramblers. He did so from 1991 to 1994. A meeting with former Stray Cats front man Brian Setzer led to the next phase of Mark W.'s career. In Nashville to record a TV show, setzer saw Mark W., slappin' and twirlin' the doghouse bass in the house band. One year later, Mark W. pl...