Unbeaten rising star Frank Martin (16-0, 12 KOs) showed the full complement of skills that has made him one of the most talked about up-and-comers in the 135-pound division, as he delivered a methodical destruction on his way to stopping Jackson Mariñez (19-3, 7 KOs) in the 10th and final round. After a tentative first two rounds, the Derrick James-trained Martin began to use his superior footspeed to put himself into position to land his lethal left hand to the head and body. “I was ready to go the distance whether I got the knockout or not,” said Martin, who’s stablemate and promoter, unified welterweight world champion Errol Spence Jr. watched his victory ringside and later told Jim Gray of SHOWTIME that he expects to face WBO titleholder Terence Crawford in a blockbuster welterweight undisputed championship fight later this year. “Me and Derrick James worked hard in the gym. It was just a matter of me being patient and not being anxious.” Mariñez was able to use his size adva