Reilly Smith and Patrice Bergeron also had goals for the Bruins. The defending Eastern Conference champions are 3-0-1 since losing five of eight, and trail only Pittsburgh in the conference.
Claude Giroux scored a power-play goal for the slumping Flyers, who've lost four in a row. They're 2-5-2 in their last nine games, tumbling from second place in the division to eighth in the East. It's their worst stretch since a 1-7 start that got coach Peter Laviolette fired three games into the season.
Steve Mason allowed four goals on 19 shots and was yanked for the second time in three starts since signing a contract extension last Saturday.