Mark Warren Spoelstra (June 30, 1940 – February 25, 2007) was an American singer-songwriter and folk and blues guitarist.

He was born and raised in Kansas City, Missouri. He began his musical career in Los Angeles in his teens and migrated around to wind up in New York City in time to take part in the folk music revival of the early 1960s. He is best remembered for his activity in the Greenwich Village area. He performed with Bob Dylan soon after Dylan's arrival in New York City, was a contributor to Broadside Magazine and recorded a number of albums for Folkways Records and other labels.

Raised as a Quaker, Spoelstra's career was put on hold from 1963–1965, when he performed alternative service as a conscientious objector in Fresno, California. [...]

http://en.wikipedia.org/wiki/Mark_Spoelstra