Casey DeSmith makes a career-high 52 saves, and Jake Guentzel notches a hat trick to reach 40 goals for the season.

An impressive overtime win over St. Louis is a good start, but the Bruins still can make some significant improvements with six games left in the regular season.

After sitting out Thursday against Ottawa, Trent Frederic returned to the lineup and scored on his first shift against Pittsburgh.

Linus Ullmark left Thursday’s game with an apparent concussion, leaving Jeremy Swayman as Boston’s No. 1 goalie for now.

Boston gets early goals from Trent Frederic and Erik Haula, and Jeremy Swayman makes 23 saves in a 2-1 win over Pittsburgh.

Boston has lost 3 of 4 games and Coach Bruce Cassidy needs the Bruins to refocus with the playoffs on the immediate horizon.

Matt Grzelcyk plays just four shifts in a loss to Washington with an apparent injury.

Linus Ulmark makes 27 saves, but banged-up Boston has its two-game winning streak snapped.

Erik Haula scores twice, including a tiebreaking power-play goal with 3:54 remaining, and Boston adds two empty-netters to close out a 5-2 win over Columbus.

Boston’s all-time leader in wins, Tuukka Rask announced his retirement last month after a setback in his attempt to come back from a torn labrum in his hip