What we learned: Is the Bruins Stanley Cup window closed?

Another off-season of uncertainty awaits for the Boston Bruins.

This season-ender didn’t come in a bitter Game 7 Stanley Cup Final loss or a nail-biting overtime affair. Instead, it came with the Bruins putting forth their worst effort of the series against an opportunistic New York Islanders bunch.

It didn’t matter if the Bruins faced the Islanders or the New York Saints. Very few players put forth an effort worthy of extending the season for at least one more game. Not Tuukka Rask. Not a turnover-prone Matt Grzeclyk. And certainly not the usually reliable leadership core.

Everything fell flat for the Bruins from the get-go. They managed to keep things even through the first 20 minutes, with…