The Blues take over the top spot from the Washington Capitals, who held it for five straight weeks. Washington is No. 2 this week.
The Pittsburgh Penguins, on the heels of a four-game winning streak and captain Sidney Crosby's return in a 7-3 win against the Minnesota Wild on Tuesday, are up one spot to No. 3, pushing the Boston Bruins down to No. 4.
The Dallas Stars made the biggest move, jumping four spots to No. 7, and the Columbus Blue Jackets are making their Super 16 season debut at No. 15.
The Vegas Golden Knights are out of the Super 16 this week after coming in at No. 8 last week. Vegas has lost four in a row and fired coach Gerard Gallant on Wednesday, replacing him with former San Jose Sharks coach Peter DeBoer.