NHL

Steen, Backes score twice, Blues rout Stars 6-1

  • St. Louis Blues' David Backes, right, deflects a puck past Dallas Stars goalie Antti Niemi, of Finland, for a goal during the first period of Game 3 of the NHL hockey Stanley Cup Western Conference semifinals, Tuesday, May 3, 2016, in St. Louis. (AP Photo/Jeff Roberson)

    St. Louis Blues' David Backes, right, deflects a puck past Dallas Stars goalie Antti Niemi, of Finland, for a goal during the first period of Game 3 of the NHL hockey Stanley Cup Western Conference semifinals, Tuesday, May 3, 2016, in St. Louis. (AP Photo/Jeff Roberson)  (The Associated Press)

  • Dallas Stars goalie Antti Niemi, of Finland, stops a shot from St. Louis Blues' David Backes, left, during the first period of Game 3 of the NHL hockey Stanley Cup Western Conference semifinals, Tuesday, May 3, 2016, in St. Louis. (AP Photo/Jeff Roberson)

    Dallas Stars goalie Antti Niemi, of Finland, stops a shot from St. Louis Blues' David Backes, left, during the first period of Game 3 of the NHL hockey Stanley Cup Western Conference semifinals, Tuesday, May 3, 2016, in St. Louis. (AP Photo/Jeff Roberson)  (The Associated Press)

  • St. Louis Blues' Alexander Steen (20) scores past Dallas Stars goalie Antti Niemi, of Finland, Alex Goligoski (33) and John Klingberg, right, of Sweden, during the first period of Game 3 of the NHL hockey Stanley Cup Western Conference semifinals, Tuesday, May 3, 2016, in St. Louis. (AP Photo/Jeff Roberson)

    St. Louis Blues' Alexander Steen (20) scores past Dallas Stars goalie Antti Niemi, of Finland, Alex Goligoski (33) and John Klingberg, right, of Sweden, during the first period of Game 3 of the NHL hockey Stanley Cup Western Conference semifinals, Tuesday, May 3, 2016, in St. Louis. (AP Photo/Jeff Roberson)  (The Associated Press)

Alexander Steen and David Backes had two goals apiece and the St. Louis Blues' defense put the clamps on the Dallas Stars in a 6-1 victory that put them up 2-1 in the second-round series Tuesday night.

Vladimir Tarasenko had a goal and two assists, Troy Brouwer had a goal and assist and Brian Elliott was strong when he needed to be for the Blues in their first lopsided triumph of the postseason. Their other five wins were decided by one goal.

The Blues finished two points behind Western Conference champion Dallas in the regular season and have control of the series heading into Game 4 Thursday night in St. Louis.

They scored four unanswered goals after Colton Sceviour gave Dallas the early advantage, three coming in a breakaway second period.