The Bruins ended their road trip with a season-high fourth straight win, beating the Islanders, 4-1 on Tuesday night.
The teams entered the second period tied at one before the B’s turned in a two-goal second period with goals from Marchand and Krejci. Campbell added an empty-netter in the third.
Tuukka Rask  made a season-high 36 saves on 37 shots, improving to 10-1-2 on the season.
The Bruins will return to Boston and host the Senators Thursday night at TD Garden.