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St. Louis, MO (SportsNetwork.com) - Logan Couture and Joe Pavelski recorded power-play goals less than a minute apart in the first period, spurring the still-unbeaten San Jose Sharks to a 6-2 rout of the St. Louis Blues in a tension-filled showdown from Scottrade Center.

San Jose went 3-for-7 with the man advantage en route to its sixth consecutive win to start the season, with Patrick Marleau also scoring on the power play in addition to contributing two assists. Joe Thornton also had a goal and two helpers for the Sharks, who dominated much of the contest and opened up a 5-0 lead early in the third period.

The victory did come with a cost, however, as Sharks defenseman Dan Boyle was carried off the ice in a stretcher after being checked from behind by Blues center Maxim Lapierre in the first period.

Vladimir Tarasenko scored for a fourth straight outing for the previously undefeated Blues, who had opened the 2013-14 campaign with four straight home triumphs. Roman Polak accounted for St. Louis' other goal.

Blues goaltender Jaroslav Halak was pulled after two periods upon allowing four goals on 26 shots.