The NFL legend and Heisman Trophy winner shares the inspiring story of his life and diagnosis with dissociative identity disorder.

Herschel Walker is widely regarded as one of football's greatest running backs. He led the University of Georgia to victory in the Sugar Bowl on the way to an NCAA Championship and he capped a sensational college career by earning the 1982 Heisman Trophy. Herschel spent twelve years in the NFL, where he rushed for more than eight thousand yards and scored sixty-one rushing touchdowns.

But despite the acclaim he won as a football legend, track star, Olympic...