The goalie is 4-0-1 with a 1.38 goals-against average and .938 save percentage in five games this season.
"I think 'Jaro' has been solid all year. … I thought he was real good tonight, " Boston coach Bruce Cassidy said. "I don't remember a lot of rebounds honestly coming back out."
The Bruins were 6-for-6 on the penalty kill and allowed five shots in 11:02 of shorthanded time.
"Tonight, it worked out, and I think everybody on our penalty kill, they deserve the credit because they did a terrific job," Halak said.
The Rangers were outshot 24-11 in the final two periods.
"This is a team that's competing for the Stanley Cup and built to win right now," New York coach David Quinn said. "We have a ton of respect for the way they play. They play the right way and we can learn an awful lot of lessons from them, but I was proud of the way we stood toe-to-toe with them."
NOTES: Halak has 51 shutouts in the NHL, fifth among active goalies. … Bruins forward Brad Marchand had his nine-game point streak end (seven goals, six assists), and defenseman Charlie McAvoy had his eight-game point streak end (one goal, 10 assists). … The Rangers are 2-for-31 on the power play in their past nine games. They were 4-for-4 on the penalty kill Friday and are 21-for-21 in their past six games.