The goal was the third in 6:34 span to overcome a 5-3 deficit in the third.
Wyatt Johnston scored his 45th of the season to cut it to 5-4 at 8:18 on the power play when he took a pass in the slot from Mikko Rantanen and shot over Artur Akhtyamov’s blocker.
Dallas tied it 5-5 at 9:38 on an own goal by Troy Stecher. Arttu Hyry was credited with the goal after Stecher stole the puck from him during a battle but then backhanded the puck past Akhtyamov from in front.
Jason Robertson extended his goal streak to four games and had an assist, and Duchene had three assists for the Stars (49-20-12), who have won four in a row and five of six. Casey DeSmith made 22 saves.
Dallas will face the Minnesota Wild in the Western Conference First Round of the Stanley Cup Playoffs.
“We weren’t great but they came out firing and then we were able to get a couple quick ones and we stuck with it,” Duchene said. “I think that’s the good part but that doesn’t surprise me. At the end of the day, you don’t want to give up five goals against anyone in this League… You never know what kind of game we will have to win in the playoffs and I like the stick-to-itiveness we had.”
William Nylander had a goal and two assists, and Jacob Quillan scored his first NHL goal for the Maple Leafs (32-35-14), who have lost six straight (0-5-1). Matthew Knies had two assists, and Akhtyamov made 27 saves.
Toronto has already been eliminated from playoff contention.
“I was disappointed, we get a 3-0 lead and we give it back to them that quickly on the second period just on mistakes, coverage. We’re right there but not close enough,” Maple Leafs coach Craig Berube said. “It’s disappointing on my end for sure.”
John Tavares gave Toronto a 1-0 lead with a power-play goal at 2:14 of the first period. Dallas defenseman Tyler Myers played the puck out in front and Tavares chipped it past DeSmith's blocker after a scrum.