"If everybody doesn't come to the rink ready to really compete and move your feet and do things right, and be detailed and attentive, we're not going to go anywhere," St. Louis coach Craig Berube said. "That's the bottom line. As a coaching staff, we're preparing them.
"We tell them what they need to do against this team, look for it, this is what you've got to do, but we can't go out and play for them. They have to go out and play as a team, and right now, we're not doing it. We're not doing it enough, we're not consistent enough 100 percent. You lose in this league."
Dubois gave Winnipeg a 1-0 lead at 15:49 of the first period after Logan Stanley's shot was wide but picked up by Scheifele, who fed Dubois in front before beating Greiss inside the near post.
Connor made it 2-0 just 27 seconds into the second period, skating in alone from the right side and snapping a shot past Greiss.
Wheeler extended the lead to 3-0 at 4:06 with a power-play goal, knocking in a rebound in the crease after Scheifele's one-timer from the outer left hash marks.
"I think we're getting a lot of flex to the net," Wheeler said. "There's a lot more movement, and that just makes us dangerous."