Their best threat to come back was on a power play in the third when trailing by two goals.
It was the first time since 1944 that a team has won a game in the final round after trailing by three goals.
While his team played a man short, the Capitals tied a game in which they had trailed by two goals.
The Rangers trailed by three goals just 12 minutes 24 seconds into the game.
The Capitals, who had trailed by two goals, went on to a 5-3 victory.
In the game, the Islanders twice trailed by two goals.
It gave the Rangers a victory after they had trailed three times by two goals.
And for the 14th time this season, the Devils trailed by two goals.
That was especially true in Games 3, 5 and 6, when they trailed early by at least two goals and managed to win each time.
The Islanders trailed by two goals before they even took a shot.