Corson began training as a wrestler in 1994 and adopted the ring name John Zandig in 1999. Shortly after debuting, Zandig opened a professional wrestling school, in New Jersey in order to hone his skills. The school eventually evolved into a professional wrestling promotion, Combat Zone Wrestling, and relocated to Philadelphia in late 2001. From its early stages, CZW was oriented towards hardcore wrestling; Zandig himself has been involved in many ultraviolent matches since the company's inception, involving such objects as thumbtacks, fluorescent light tubes, barbed wire, and a weed wacker. On one occasion, he was hung from meat hooks.