The lead lasted all of 55 seconds. The B’s top line got hemmed in its own end for much of the shift and, after it finally pushed it out of the zone, the players got caught in a change. On a Sabre 4-on-3, Matt Poitras got lost out high and Dylan Cozens connected with the wide-open trailer Thompson, who ripped a slapper past Swayman.

The Bruins lost by a 7-2 score to the Sabres, who are at the very bottom of the Eastern Conference standings. They were outplayed