Later on the same shift, an Oshie giveaway led to Roy's third of the year with 1:40 remaining. Roy picked off Oshie's pass inside the St. Louis blue line, worked his way to the left circle and fired a wrist shot that burrowed its way through Elliott's right arm and dropped in for a 2-1 Dallas lead.
"I think Roussel's fight gave us a lift," Roy said. "They have big bodies and were working us down low, but Rous's fight gave us a boost and after that, we got that goal by Cole and we took off after that."
The Blues nearly tied it 2:42 into the second while on the power play, as Perron fired a wrist shot from the high slot that Lehtonen got enough of to deflect it just wide of the left post.
Elliott made a nice stop on Cole's point-blank wrist shot at 7:55 with Dallas on the power play.
Lehtonen then came up big with a nice pad stop at 12:55, denying Cracknell's deflection in front.
NOTES: Stars rookie D Brenden Dillon was a physical force, delivering a game-high 11 hits while logging 25:03 of ice time, much of it against the Blues' top line. ... Blues RW Adam Cracknell left the game with 7:12 remaining in the third period after crashing face-first into the boards during a collision with Stars D Jamie Oleksiak. He did not return. ... The Stars honored Blues LW Jamie Langenbrunner, who played in Dallas from 1995-2002 and 2009-10, as part of the club's all-time team. Langenbrunner, who is out for the season with a hip injury, helped Dallas win the 1999 Stanley Cup.