Speedfreek, AKA, Leon "Joss" Shappe is a Marvel Comics villain, and an enemy towards both the Hulk and the New Warriors.
Leon Shappe started out as both a petty criminal and police informant. Leon would to this to help him feed his drug addiction. For whatever reason, Shappe decided to murder a local inventor and also stole a sophisticate combat suit from him. Shappe decided to use the suit to become an assassin for hire known as; Speedfreek.