Richard "Grass" Green was a founding father of the fan art comics scene in the 1960s. He was among the first African-American artists to win popularity in the USA, and he published his early works in such fan magazines as Alter Ego, The Comicollector, Komix Illustrated, Super-Hero and Masquerader. Among his creations were 'Xal-Kor, the Human Cat' and 'Wildman and Rubberroy'. From 1967, his art was featured in Go-Go and Charlton Premier.
Grass Green became the first African-American cartoonist in underground comix beginning in the early 1970s. He created among others Super-Soul Comix, a hard-edged expose of racism and bigotry in America at the time. His 'Wildman and Rubberroy' stories were published in twelve issues in the 1980s. From 1982, Green worked with Michael Vance on the comic strip 'Holiday Out'. Some of this work was also released through comic books including Holiday Out Comics (Renegade Press), Comico Primer (Comico) and Mangazine (Antarctic Press).