robert john riggins (born august 4, 1949 in seneca, kansas) is a retired american football running back who used to play for the new york jets and washington redskins of the nfl. he was nicknamed "the diesel". he won super bowl xvii with the washington redskins where he was also the mvp and is a member of the redskins ring of fame. he was inducted into the pro football hall of fame in 1992.