McCulloch, who came from the same Dorset area that King Crimson co-founder leader Robert Fripp came from, had played drums with Manfred Mann on their 1970 album Chapter Three Vol. 2 before was recruited into Crimson in April of 1970, only a few weeks after original drummer Michael Giles exited the Crimson line-up. McCulloch performed gamely amid the wall of art-rock sound that was the Lizard album--his playing got just a little lost amid Fripp's Mellotron eruptions and Marc Charig's and Mel Collins' cornet and sax work, respectively, on the album. The exit of singer-bassist Gordon Haskell in November of 1970 led to the collapse of the line-up and McCulloch's departure.
McCulloch never got too far from the more progressive side of rock music. Ten months after leaving King Crimson, McCulloch turned up in the line-up of Graham Fields' short-lived band Fields, before jumping to Greenslade in the late fall of 1972. He remained with them for three years and four albums, thru 1975. Apart from the reissues of his Crimson tracks, McCulloch was last seen playing with ex-Genesis guitarist Anthony Phillips on a series of tapes that were released in 1980 as part of Phillips' exploration of his own musical past. As was the case with most of Crimson's drummers before Bill Bruford, McCulloch was underrated technically, an understandable result of trying to fill the shoes of Michael Giles, one of the great percussionists in progressive rock.