Berglund's team-leading 12th goal of the season came after the Blues rallied from two goals down in the third period. Sobotka, who is riding the best streak of his career, had both scores to tie it before Berglund's game-winner.
Scott Gomez had a goal and assist for San Jose, which has lost nine of its last 11 against St. Louis.
It was definitely emotional. I really appreciated the fans. It was a cool feeling and it felt special and the ovation there at the start and then you kind of feel funny out there standing by yourself. Thinking back, I was saying just a bit ago, you think back just trying to make the NHL and then you kind of reflect on all the years being able to play for a great organization here in Calgary and all the fun I've had so far in my career. I feel very fortunate and blessed.
— Boston forward Jarome Iginla on his return to Calgary, where he played for 16 seasons