Discussion on the GCD Main list among art spotters could not come up with any solid leads. It is believed it is most likely someone trying to draw in the style of Jim Starlin, but not Jim Starlin himself.
from The Incredible Hulk (Marvel, 1968 series) #127 (May 1970) [1 page removed]
from The Incredible Hulk (Marvel, 1968 series) #129 (July 1970) [2 pages removed]
from The Incredible Hulk (Marvel, 1968 series) #184 (February 1975) [1 page removed]