Mark Otis Selby (born in Enid, Oklahoma) is an American blues rock singer-songwriter, guitarist, multi-instrumentalist and producer. He is a solo artist, signed to ZYX Records in Europe, and one half of performing duo with his wife, songwriter Tia Sillers. He also plays guitar in recording sessions for musical artists such as Kenny Rogers, Johnny Reid, Keni Thomas, Jimmy Hall, and Wynonna Judd.