The Buffalo Sabres had an early lead Wednesday night, but it quickly slipped away in a 5-1 loss to the Boston Bruins at KeyBank Center.
Kyle Okposo scored the first goal of the game, but the Bruins scored four goals in the final 6:31 of the first period to help them cruise to victory.
Aaron Dell made 18 saves on 22 shots in the first period before being relieved by Dustin Tokarski, who stopped 24 of 25 shots.
Patrice Bergeron, Charlie Coyle, David Pastrnak, Mike Reilly and Taylor Hall scored for Boston. Jeremy Swayman turned aside 24 shots.
Buffalo finished the game on the power play and on the penalty kill. The Sabres have now lost four in a row.