Comic book artist who began illustrating the Teenage Mutant Turtles in 1985. He also designed Teenage Mutant Ninja Turtle action figures for Playmates Toys.
He created the concept for a comic book series called the Hallowieners in 1984. The series was first published five years later.
He makes an appearance in the 2014 documentary Turtle Power: Definitive History of the Teenage Mutant Ninja Turtles.
He was born in Lodi, Ohio.
Hollywood star Megan Fox stars in the 2014 film interpretation of the Teenage Mutant Ninja Turtles.