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).
It's something that you don't really envision starting this way, but when you put the work in you don't feel like it's unwarranted. You definitely don't envision it unfolding this way, but you do think you can be successful at this level.
— Senators goalie Andrew Hammond, who defeated the Jets on Wednesday to improve to 6-0-1 since making his first NHL start on Feb. 18