St Louis’ Alexander Steen netted a slap shot with 21.1 seconds remaining to give the Blues a 3-2 win over Chicago on Wednesday.
In the day’s other games, Los Angeles edged Ottawa in overtime, and Calgary had a narrow victory over Montreal.
Steen broke down the left side as part of a 3-on-1 rush. He kept the puck and let go a drive from just inside the circle that trickled past goalie Corey Crawford.
Vladimir Tarasenko and David Backes also scored for St Louis, who have won their opening three games of the season to match the efforts of 1969-1970 and 1993-1994.
Patrick Kane scored for the third straight game for the Blackhawks, and Jonathan Toews had the other Chicago goal.
Los Angeles’ Jeff Carter scored his second power-play goal by deflecting in Mike Richards’ shot 28 seconds into overtime, giving the Kings a 4-3 win over Ottawa.
Los Angeles had led 3-0, but the Senators rallied to force overtime and collect a point.
Dustin Brown scored twice during the Kings’ three-goal first period, and Carter had three points in Los Angeles’ sixth straight home victory over Ottawa.
Milan Michalek scored the tying goal with 4 minutes, 27 seconds left in regulation for the Senators. Jean-Gabriel Pageau netted his third career goal in the second period, and Bobby Ryan scored his first goal with Ottawa early in the third.
Calgary’s rookie forward Sean Monahan had a goal and an assist to lead the Flames to a 3-2 win over Montreal.
Sven Baertschi and Curtis Glencross also scored for Calgary.
P.K. Subban had a goal and an assist for the Canadiens, while Lars Ellar recorded his fourth goal and sixth point of the season.