The keyboardist left shortly after the band’s first single was released

Lanier Greig, keyboardist in the original incarnation of ZZ Top, died last week in his sleep at the age of 64.

Greig was not in the band for long, but he did play on their first single, 1969’s “Salt Lick.” Greig’s keyboards play a large role in that song, which sounds vaguely similar to the Doors’ bluesy, keyboard-driven sound.

It was reported that shortly thereafter Greig left ZZ Top after having “creative differences” with Billy Gibbons and the rest of the band. And, as you know, from there ZZ Top went on to world-wide fame.