An airtight penalty kill also can be a confidence-booster. The Islanders went 4-for-4, allowing the Blue Jackets five shots on the man advantage. Three of the penalties came in the second period, sapping the Islanders’ first-period momentum.

Two goals from Matthew Schaefer, the second tying the game at two with under a minute to go, helped the Islanders to a stunning 3-2 comeback win over the Blue Jackets on Sunday night at UBS, as Simon Holmstrom potted the winner with 37 seconds to go.

Rookie Matthew Schaefer and Simon Holmstrom scored 29 seconds apart late in the third period, helping the New York Islanders rally for a 3-2 win over the Columbus Blue Jackets

BOSTON — Two of the Islanders’ six defensemen were again rookies on Tuesday night against the Bruins at TD Garden with Laurel Hollow’s Marshall Warren playing in his second NHL game and No. 1 overall pick Matthew Schaefer already the team’s most dynamic blue-liner.