All series long, Brad Marchand poked, prodded and got under the skin of several of the Pittsburgh Penguins. He was a constant annoyance, and that didn’t stop last night during Game 4 of the Eastern Conference finals. But for Marchand, the best revenge came in the form of one crisp pass to Adam McQuaid. With the game scoreless in the third period, the left winger had the puck and plenty of options. The Bruins were in the middle of a line change and Marchand’s first thought was to dump the puck. But as he crossed over the blue line, he immediately turned up and saw David Krejci. Krejci had a good head of steam and Marchand thought about sending the puck his way. But he waited for a moment. As the Penguins defensemen pulled back, McQuaid was all alone. Marchand sent him a pass and McQuaid put it home for the score, at 5:01, to lift the B’s to a 1-0 win over the Penguins and send them to the Stanley Cup finals. “I didn’t see him until the last second when I gave it to him,” Marchand said. “When I turned up, I was going to go to Krejci. I was looking for him. Then I just saw Quaider came up behind him and Krejci just kind of pulled his guy through and I just gave it to him. He made a great play.” Marchand’s never been afraid to get in someone’s face. His role as an irritant was highlighted in the 2011 Stanley Cup finals when he sent a series of jabs to the face of Canucks forward Daniel Sedin.