Blue Jackets coach John Tortorella has not hesitated to play Dubois against an opponent's top line. That meant going head-to-head with Pittsburgh Penguins star center Sidney Crosby on April 5.
Against the Capitals, Dubois, a 6-foot-3, 207-pound native of Sainte-Agathe-des-Monts, Quebec, has mostly been matched against either Nicklas Backstrom or Evgeny Kuznetsov.
"He has a mental toughness for a 19-year-old kid to accept that type of responsibility and want more," Tortorella said. "It's a different guy. You've got to be careful with young kids, but he has showed me tremendous progress and instant mental toughness as I've gotten to know him as the season's gone on."
The Capitals have scored two even-strength goals so far in the series and neither came from their top two lines. The Blue Jackets have scored five goals at 5-on-5, including Panarin's overtime goal in a 4-3 win in Game 1, when Dubois earned an assist.
"There's a little bit of pressure, but I like winning," Dubois said. "I don't like losing, so any game I've got to give everything I have to win. Now it's the playoffs, but I don't change the way I see it. I just want to help my team win. Whether it's playoffs Game 1 or Game 7, I think it's the same thing."
No one, including Dubois, expected him to be playing such an important role so quickly. While Matthews, who was selected with the No. 1 pick by the Toronto Maple Leafs in the 2016 draft, and Laine, who was chosen No. 2 by the Winnipeg Jets, were going 1-2 in the Calder Trophy voting last season, Dubois split 2016-17 between Cape Breton and Blainville-Boisbriand in the Quebec Major Junior Hockey League, and had 55 points (21 goals, 34 assists) in 48 games.
After Dubois made the Blue Jackets in training camp in September, the plan was to ease him into things by playing him at wing on one of their bottom two lines. Partly out of necessity and partly to get Dubois to skate more, Tortorella shifted him to center, the position he played during his last season-and-a-half in junior, against the Florida Panthers on Nov. 2.
From there, Dubois gradually worked his way up from the fourth line to the top line, earning more responsibility and ice time when he demonstrated he was capable of not only playing with top offensive players but also defending against them. Tortorella said he's become "probably one of our best 200-foot players" and often uses him as an example to veterans during video review sessions.