The undefeated Sumpter brothers, super middleweight Steve (5-0, 5 KOs) and heavyweight Quintin (4-0, 4 KOs), are making up for lost time in professional boxing. Fighting out of Pittsfield (MA), the two members of Granite Chin Promotions’ growing stable got a relatively late start in boxing, both turning pro June 26, 2021, in Derry, New […]