GARFIELD HEIGHTS, Ohio — Ashton and Henry Jolly IV had already posed for a handful of photos with giddy elementary school kids by the time the NEO Boys National Showcase began on a Saturday morning in late June. The twins had been advertised as headliners on social media by event organizers for weeks, and their father, Henry Jolly III, entered the gym with every promotional material he could carry, a black duffel bag full of gear that included mouth guards, knee pads and arm sleeves provided free by prospective sponsors, along with headbands stamped with the personal logo he created for his kids, “Jolly Boys.”