Lloyd Grant is a Jamaican musician. He only played on Metallica's first demo "Hit The Lights" for the first pressing of the Metal Massacre compilation released in early '82. It is still argued by fans whether or not he can be counted as a member as he only played one demo and never contributed anything else to the band, however his name is still mentioned in the liner notes of the album Garage Inc as being the Lead Guitarist for a brief time.

(source: http://en.wikipedia.org/wiki/Lloyd_Grant)