Notes: The 21-year-old Karlsson is the youngest defenseman to reach 70 points since the Rangers’ Brian Leetch in the 1988-89 season. … Friday’s game was the second of three over a nine-day span between Ottawa and Montreal. The Canadiens were 3-2 winners in a shootout at home March 14 and the two will meet for the sixth and final time this season in Montreal on March 23. … Plekanec’s goal was his 139th with the Canadiens, two behind Ryan Walter for 40th in team history.