Afro-American letterer Holloway worked primarily for Timely/Atlas/Marvel, possibly beginning as a freelancer during the late 1950s monster era.
He worked on series including Tales to Astonish, Spider-Man, Iron Man, Strange Tales, Journey Into Mystery, Fantastic Four, Werewolf by Night, Tomb of Dracula, Rawhide Kid, Kid Colt Outlaw, Defenders and Incredible Hulk. His last known work appeared at Marvel in the mid-1970s in Spidey Super Stories.
Holloway also worked for Western Publishing's Gold Key (1962-68), King Comics (1966-1967) and DC Comics (1968-1970). Some work was also printed by Charlton (1970) from Gold Key inventory.