Born: 1899 December 31 in Knobs Township, North Carolina, United States
Died: 1943 May 25 in New York City, New York, United States
Biography: Greenwood began his career as a cartoonist for the New York Evening Journal in 1921, continuing with the paper after its merger with its morning sister paper, The New York American, in 1937 to become The New York Journal American. Starting in 1930, he started doing pen and ink illustrations for the pulp magazine, Love Story (Street & Smith 1922 series). Greenwood would paint several pulp magazine covers during the 1930s.
In 1940 he began to work for comic books, doing Hyper the Phenomenal for Hyper Publications. From there and continuing up to 1943, Greenwood moved on to United Feature Syndicate comics and drew Mirror Man, Triple Terror, and most notably, Sparkman.
Eventually he took over the art duties on the comic strip, Hap Hopper - Washington Correspondent (United Feature Syndicate, 1940 series) in 1942 and continued until his death in 1943 of heart failure.