Don't doubt Terence Crawford, even in his retirement from boxing - ESPN

Don't doubt Terence Crawford, even in his retirement from boxing  ESPNAt 42-0, Crawford retires: 'Nothing left to prove'  ESPNTerence Crawford announces retirement from boxing  Sky SportsTerence Crawford announces shock retirement from boxing: 'Nothing else left to prove'  Yahoo SportsTop pound-for-pound boxer Terence Crawford, retires on top with 42-0 record  CNN