EUMIR FELIX MARCIAL beat American Isiah Hart via technical knockout in the fourth of their scheduled six-rounder on Sunday in Las Vegas, a convincing result that ironically—and more importantly—gave the Tokyo Olympics bronze medalist points to ponder in his budding professional career. “Welcome to the pros!” MP Promotions President Sean Gibbons told Marcial after the fight at the Virgins Hotel in Las Vegas, Nevada, that ended with 47 second remaining in the fourth round. The result was good for Marcial’s portfolio as a pro, but the fight was ugly early on for the pride of Zamboanga City. “It’s…