From Wikipedia:
Boz Burrell (born Raymond Burrell) 1 August 1946 in Lincoln, England–21 September 2006 in Spain was a bass guitarist known for his involvement in bands such as King Crimson and Bad Company.
While singer/leader of The Boz People in the mid-1960s, Boz was selected to replace Roger Daltrey in The Who when the remaining members of that band were on the verge of firing Daltrey, which ultimately did not happen. (Moon: The Life and Death of a Rock Legend By Tony Fletcher)
In the late 1960s, he released some solo singles as singer (simply as "Boz"). At that time, he was joined by Ritchie Blackmore, who was in the process of setting up Deep Purple. It is reported that new Deep Purple members Jon Lord (keyboard) and Ian Paice (drums) also joined the session and played on two tracks: "I shall be released" and "Down in the Flood".
In 1971, he was brought into King Crimson as a vocalist and, as the band needed a bassist, was rapidly taught bass by guitarist Robert Fripp. He was part of the band that recorded Islands and a post-breakup compilation live album Earthbound. In recent years, King Crimson's record company has issued collectors' live recordings from this era of the band.