Bob Mosley is an American singer-songwriter and bassist, best known for his work with the 1960s rock band Moby Grape. Mosley's style is characterized by a fusion of rock, blues, and country, with his bass playing and soulful vocals being key components of Moby Grape's signature sound. Notable for his contributions to songs like "Mr. Blues" and "Come in the Morning", Mosley significantly shaped the band's musical direction. Despite personal struggles, his works have had lasting influence on the psychedelic and folk rock genres.