Analysis: What do the Penguins have that Detroit did when it won back-to-back Cups?
If winning back-to-back Stanley Cups were easy, every good team that hoisted the 34.5-pound trophy would do it again and again. That’s the rub when it comes to winning the Cup. Only 13 of the 30 – soon to be 31 – teams in the NHL have won it more than once and just 10…