The Herschel Walker you know is likely the one who won the Heisman Trophy , played 15 years of professional football .
The Herschel Walker you know pursued a number of competitions -- from bobsledding to mixed martial arts .
The Herschel Walker you know is likely the one who won the Heisman Trophy , played 15 years of professional football and pursued a number of competitions -- from bobsledding to mixed martial arts .