At the 7:49 mark of the first period, Dube set up Calvin Thurkauf's power play goal when he dished the puck to Thurkauf from top of the right face-off circle and the forward jammed the puck past Raiders' goaltender Ian Scott.
Dube's second assist came in the second period when he got the puck off to Thurkauf in the neutral zone, Thurkauf passed it to Nick Merkley from the bottom of the face-off cirlce and Merkley put a wrist past Scott. The power play goal, coming at 12:43, gave the Rockets a 4-0 cushion.
The forward picked up his third assist at the beginning of the third period. Dube shovelled the puck into the corner, where it was corralled by Kole Lind. Circling back, Lind fired a shot high that found the back of the net at 1:48.
The Flames drafted Dube in the second round (56th overall) of the 2016 NHL Draft. In his draft-eligible season with the Rockets, he scored 26 goals and 66 points in 65 regular season games.
"Real skilled player, shooter," Flames director of amateur scouting Tod Button said. "We always talk about upgrading skill - never enough skill. You watch the playoffs and goals are hard to come by. He's a shooter, a scorer. He's a very quick player from the dots in."
