PITTSBURGH — Sidney Crosby was his usual cool self as he prepared for another monumental game in his already storied career. “You’ve got to refocus,” said the 29-year-old moments after a close Game 6 loss to the Ottawa Senators. “It’s a big one.” Big one especially for Crosby. The captain of the Pittsburgh Penguins has plenty riding on Thursday’s decisive Game 7 of the Eastern Conference final, beginning with the opportunity to chase a third Stanley Cup. Getting to the final for the fourth time in less than 10 years (he’s 2-1 so far following appearances in 2008, 2009 and 2016) would be a remarkable feat on its own for the Cole Harbour, N.S., native and a rarity in today’s parity-infested NHL.