Zack Harper was a reckless kid from the Sky-Slums of Harlem who was scouted out by Giant. On their first meeting, he was using an illegal home-made jet pack. When it over-heated, Giant saved him from falling to his death.
His father was doing a stretch for armed robbery.
His first game for the Heroes was against the Baltimore Bulls, a team which consisted of police. He lost his temper a number of times, which led to Conrad King being sent to the penalty pen and to himself crashing in to a TV camera boom.