Boston Bruins left wing Cole Koepke (45) collides with Buffalo Sabres goaltender Ukko-Pekka Luukkonen in the crease during the second period of an NHL hockey game, Tuesday, Jan. 28, 2025, in Buffalo, N.Y. (AP Photo/Jeffrey T. Barnes) AP

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.