Berglund, who was activated from injured reserve, missed the first 24 games of the season after dislocating his left elbow during offseason training in his native Sweden.
The Blues, 4-1-0 in their past five games and 11-4-0 in their past 15, have the best record in the Western Conference.
The Ducks will try to avoid what would be their season-long fifth straight defeat. Anaheim, 0-3-1 in its past four games, will be without defenseman Brandon Montour, who hyperextended his elbow in a 7-3 loss at the Chicago Blackhawks on Monday.