Mike Guentzel thought he had a handle on his son Jake’s surreal, dream NHL season that culminated last month with the Pittsburgh Penguins winning the Stanley Cup while the 22-year-old Guentzel tied an NHL playoff record for most points (21) by a rookie in the postseason. But then the family brought the Stanley Cup, hockey’s hallowed trophy, on Thursday to Woodbury — the eastern suburb where Jake Guentzel grew up and grew his game.