Observations: The St. Louis Blues had a chance to remain undefeated on their season-opening road trip, hurt by costly mistakes in a 4-3 loss to the Vegas Golden Knights

The St. Louis Blues were under pressure early in their season. It's not the usual way to win consistently, but it worked in wins against the Seattle Kraken (3-2) and the San Jose Sharks (5-4 in overtime) earlier in the…