When young Zane Yama was bullied by school bully Miller Hallendale, he discovered that he had inherited the powers of his father, the unstoppable Juggernaut, a reformed hero and member of the X-Men. J2 lived most of his younger life without the guidance of his father, who had gone missing on a mission with the X-Men. Later announcing his retirement, Juggernaut was content to let J2 to carry on his legacy, having proven himself worthy of the powers he wielded. Zane seems to have a crush on Wild Thing, and vice versa.