Kings coach Todd McLellan didn't think they did anything wrong on the sequence, pointing instead to two earlier missed chances by Anze Kopitar to score into an empty net and another by Iafallo, when St. Louis forward Robert Thomas had to take a penalty to prevent a goal.
"Even the goal, I don't know what we would do on it," McLellan said. "It hits 'Quickie,' it bounces. It goes over a few people, it goes off 'Kopi's' foot, and it's in the net. So where was the mistake made? Probably not hitting the open net."
The Kings regrouped in overtime, which McLellan credited to being on the power play, and they outshot the Blues 8-0.
"We're always looking for two [points]," Blues coach Craig Berube said. "I mean, we tied it up and did not have a very good overtime. Just careless with the puck, some bad reads. [Binnington] was really good in overtime."
Kempe, Iafallo and Kaliyev scored in a four-round shootout for Los Angeles. David Perron and Jordan Kyrou scored for St. Louis.
Kempe put the Kings ahead 2-1 at 12:15 of the third period. Binnington wasn't able to cover Iafallo's wrist shot from close range, leaving the goal empty as Iafallo recovered the puck before passing from behind the net to Kempe in the crease for his second goal of the season.
"He stripped the puck after a scoring chance. Behind the net, stood over the puck, protected it long enough so that [Kempe] could get in the open, put it in the right spot," McLellan said. "That's a check for me. [Iafallo] does all of these little things."