Kevin Shattenkirk scored the go-ahead goal 56 seconds after the Bruins tied it in the second period, and the NHL-leading Washington Capitals sent Boston to a season-ending 3-1 loss on Saturday that set up a potential first-round playoff matchup between the teams.
Backup Philipp Grubauer made 21 saves for the Capitals. Marcus Johansson and Justin Williams also scored for Washington, which has won 10 of its last 11 games.
Bruins No. 2 goalie Anton Khudobin stopped 21 of 24 shots he faced in the first two periods before he was replaced by starter Tuukka Rask. The team said Khudobin wasn't feeling well. Rask stopped all eight shots he faced in the third period.