is a gambling addict and Liz Allan's older brother. After being released from juvenile hall, he returns to school and becomes the love interest of Mary Jane Watson. Mark later falls victim to his old gambling habits and is forced to undergo a procedure that fuses his skin with nanotechnology, allowing him to encase himself in a heated organic and impenetrable armor. His abilities are controlled by the Green Goblin, who blackmails Mark into destroying Spider-Man for him