By Dean Berman: Errol Spence Jr. showed that he’s the new pay-per-view king for the welterweight division with his unification fight against Shawn Porter tracking at over 300,000 pay-per-view buys on Fox Sports for last Saturday. Spence-Porter expected to bring in 350,000 buys, according to @MikeCoppinger. Those numbers could eclipse the 300,000+ buys Spence’s previous […]