Arizona has lost seven of 10 and are about to start a five-game trip. Max Domi scored twice, Kevin Connauton had a goal and two assists and Michael Stone had two assists. Louis Domingue stopped 30 of 35 shots before being pulled in the third period.
The Blues led 4-1 after 11 minutes behind Tarasenko's power-play goal and scores from Steen, Schwartz and Gunnarsson.
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