Biography: 'Iceman' John Scully (born July 28, 1967) is a former American boxer. Formerly a world-ranked professional light heavyweight, he is now a boxing trainer who has trained two light heavyweight champions in Chad Dawson and Artur Beterbiev and is an analyst for the ESPN Classic television network. John is also known for his work with disadvantaged former fighters and charity for them as well as organizing events targeting former amateur standout fighters and reconnecting them with the boxing community.