Since no-nonsense coach Darryl Sutter has been behind the bench, the Flames are 2-0. The Flames beat the Canadiens 3-1 and 2-1 in those games. These low-scoring games weren't a fluke. The Flames have made a huge commitment to defend better with their forwards aggressively checking since Sutter took over. 
Despite the presence of superstars Connor McDavid and Leon Draisaitl, the Oilers have scored 3 or fewer goals in seven of their last nine games. 
Edmonton, though, has been underrated defensively. The Oilers have given up an average of just 1.8 goals during their last five games. They haven't allowed more than two goals in each of their past five games.