After their offense keyed consecutive victories to open the season, the Pittsburgh Penguins' poor defense has led to back-to-back defeats.
The Penguins likely have to tighten things up Sunday night when they visit the Ottawa Senators, one of the highest-scoring teams in the Eastern Conference through the first week.
Playing on the road for the fourth time in its first five games, Pittsburgh (2-2-0) looks to come out of its difficult season-opening stretch with a winning record.
The Penguins and Senators have picked up where they left off after ranking first and fourth, respectively, among the NHL's top goal-scoring clubs last season.
Pittsburgh has scored 13 through four games, including nine in road victories over Philadelphia and the New York Rangers to begin the year.
The Penguins, however, will try to improve defensively to avoid a third straight loss after allowing nine goals in their last two contests.
Goalie Marc-Andre Fleury is expected to get the start at Ottawa, wher...