James Lang lost both of his parents at an early age, and spent most of his childhood in orphanages and on the streets of Chicago's Southside; he eventually became involved with crime, and served time in juvenile facilities. Later, as an adult, Clubber was sent to prison for five years for felony aggravated assault. During his time in prison, he discovered boxing as a way to let out his frustration and anger, which leads to the events of Rocky III. This is also evident in the game Rocky Legends.