The Boston Celtics know how to win. And while the team is now preparing for the next NBA season, Peter Stringer, Senior Director of Interactive Media is on the court every day. With 6.5 million fans on Facebook and 600k followers on Twitter, Peter’s work is just getting started. Serving customers in today’s hottest networks is one thing. Catering to a worldwide community of rabid sports fans requires in a series always-on digital arenas takes a different level of engagement…