Ben Clarfield, Golden State’s manager of youth basketball, earlier hustled from station to station with a white piece of paper telling the coaches a special guest was about to join their screens: Golden State power forward Marquese Chriss. The star-studded Warriors, despite an NBA-worst 15-50 season following five straight trips to the NBA Finals and three championships, are hugely popular worldwide. “There are kids that would never get to take part in a GSW camp that now can feel like a part of it,” general manager Bob Myers said.