Jeremy Lauzon tied it 1-1 at 11:40 with a slap shot from the right point after Krejci chipped the puck along the boards to him.
"Did it in the right way, didn't overthink it," Bruins coach Bruce Cassidy said. "Just got it, got off the wall, make sure you pound it hard so it gets by the first layer. If it gets blocked closer to the net, at least it's not going to be a quick transition. We've been trying to instill that attitude in some of our other guys."
Nicolas Hague scored on the power play for the Golden Knights with a one-timer from the top of the right face-off circle off a Nate Schmidt pass to make it 2-1 at 10:59 of the second period. It was his first NHL goal.
"It's definitely a dream come true for me," said Hague, a rookie defenseman who's played 38 games for Vegas. "I felt like it took forever, but we're there. I'm definitely happy with that, but really it sucks just the way the game ended."
Halak got his second assist of the season when he passed to the Vegas blue line to Charlie Coyle, who set up DeBrusk for the tying goal.
"It was like the first drill of, I think, a couple practices ago, we were doing where we did set breakouts and then also goalie handles," DeBrusk said. "… He made the play to get it up to [Coyle]. ... I guess it worked. Practice like you play."