Jamie Benn gave Dallas a 2-1 lead at 11:55 when he redirected in a shot pass from Lundkvist as he drove to the front of the net.
Seguin then made it 3-1 at 12:24 off a behind-the-back pass from Matt Duchene on a 2-on-1 rush.
“I thought we should have had four or five rather than just one,” Duchene said of his line with Seguin and Mason Marchment. “Chemistry is something you can’t quantify. You can work on it always, but when it’s there, it’s there. [Seguin] is a [heck] of a player. You take him out of the lineup, take him off a line, there’s definitely a hole. It was really fun to play that way, kind of picked up where we left off. He had good jump for being out as long as he was.”
Robertson made it 4-1 at 4:12 of the third period when Thomas Harley's point shot deflected in off his skate at the top of the crease.
Craig Smith extended the lead to 5-1 at 5:25 on a rebound from the bottom of the right face-off circle.
Leonard cut the lead to 5-2 at 8:50 from the slot. It was the sixth goal of his career and first with Arizona (four games).
“It feels good to score, and it’s my first one with the Coyotes,” Leonard said. “It felt pretty good. We would have liked to have come out with a win, though.”
NOTES: Lundkvist left the game at 8:26 of the third period after a shot rolled up his stick and hit his face. DeBoer said Lundkvist needed stitches, and they hope it is nothing more. … Benn played his 1,100th NHL game. … Stars defenseman Jani Hakanpää missed the game due to a lower-body injury. … Keller has five goals in his past five games and became the first Coyotes player to record three straight 60-point seasons since Jeremy Roenick (1998-99 to 2000-01).