Plekanec deflected a shot by the 6-foot-6 son of former NHL defenceman Mark Tinordi past Johan Hedberg at 6:49 after the goalie made an ill-advised clearing attempt from behind his net. Tinordi got the puck above the left circle and let it fly.
Colby Armstrong also scored for Montreal, and Carey Price made 32 saves. The Canadiens moved into a tie with Pittsburgh for the most points in the Eastern Conference.
Defenceman Peter Harrold scored for New Jersey, which lost for the second time in two nights (0-1-1).
You get the right the whistles at the right times, you can leave him out there. He's a beast when it comes to being on the ice. I thought [Saturday] he was a big man. That first period, he did that lateral cut and it was like three bowling pins bounced off him. There's not too many guys that can do that.
— Capitals coach Barry Trotz on Alex Ovechkin, who enters February tied for the NHL lead in goals