Pettersson, a forward selected No. 5 by Vancouver in the 2017 NHL Draft, leads NHL rookies with 10 goals and 17 points. He has nine points (five goals, four assists) in his past five games.
Dahlin, a fellow Swede who was selected No. 1 by Buffalo in the 2018 NHL Draft, is fifth among NHL rookie defensemen with five points (one goal, four assists).
The Canucks, 4-0-1 in their past five games, are coming off an 8-5 win at the Boston Bruins on Thursday. They have scored at least four goals in each of the four wins.
Rasmus Ristolainen scored at 1:38 of overtime to give Buffalo a 6-5 win against the Montreal Canadiens on Thursday. It was his fourth overtime goal for the Sabres, the most by a defenseman in their history.