Marner and Keegan Kolesar each had a goal and an assist, and Reilly Smith and Ivan Barbashev also scored for the Golden Knights (25-14-14), who have lost five of their past six (1-3-2). Hill made 23 saves.
“It’s a bit baffling at times,” Vegas coach Bruce Cassidy said. “Take care of the puck and play direct. You’ve heard me say that. Play direct. That’s why it’s baffling when they see the end result. It’s on me to do a better job to get them to understand.”
Duchene gave the Stars a 1-0 lead at 1:37 of the first period. Benn cut across the low slot and got Hill out of position, and although his centering pass wasn't able to be handled by Steel, it wound up on the stick of Duchene, who scored into the open net.
Kolesar tied the game 1-1 at 4:07 of the second period. Marner helped poke the puck out from the left corner into the low slot, where Kolesar scored glove side on Oettinger.
Bourque responded to put Dallas back in front 2-1 at 8:46. He scored on a one-timer from the low slot off a pass from Roope Hintz after Jason Robertson poked the puck away from Kolesar behind the net.
Bourque then made it 3-1 at 14:16 on another one-timer, this time from the right circle off a short backhand pass from Benn.
“He played a good game,” Benn said. “He’s fitting in with [Hintz] and [Robertson]. It’s not always easy playing with elite guys like that. He’s doing great and it’s nice to see him get a couple.”