PORTER BATTERS BERTO, STOPS HIM IN NINE
BROOKLYN – Shawn Porter scored a ninth round stoppage of Andre Berto to become the WBC’s mandatory challenger to unified welterweight champion Keith Thurman in the main event of SHOWTIME CHAMPIONSHIP BOXING, presented by Premier Boxing Champions, Saturday night on SHOWTIME from Barclays Center in Brooklyn. With the convincing victory, Porter potentially earns a…