Errol Spence improved to 28-0 with his 22nd knockout, the first time in his last four fights the 32-year-old southpaw didn’t have to go the distance. Errol Spence Jr. became a three-belt welterweight champion by defending his WBC and IBF titles in a unification bout in front of a home crowd, when his fight against Yordenis Ugás was stopped in …