Rask up to the task as B's blank Lightning
Defenseman Dennis Seidenberg and Daniel Paille scored goals for the Bruins. Rask collected his 16th career shutout as Boston moved two points ahead of Montreal for the Northeast Division lead. Montreal played Winnipeg later on Thursday.
The Bruins held two of the league's top three scorers, Martin St. Louis and Steven Stamkos, to six shots on goal combined and killed three Lightning power plays. Anders Lindback made 22 saves for Tampa Bay.
Seidenberg broke the scoreless tie 4:22 into the second session, beating Lindback from the top of the right faceoff circle after a drop pass from Brad Marchand. Paille doubled the lead a little over nine minutes later, converting a cross-ice pass from Gregory Campbell.
Rask stopped nine shots in each of the first two periods, including two in succession on Lightning rookie Alex Killorn late in the second. Tampa Bay has not won in Boston since the first game of the Eastern Conference finals in 2011, losing the last six.
GAME NOTEBOOK: The Lightning wore a "Boston Strong" ribbon stickers on their helmets to support the victims of the Boston Marathon bombings and the city. ... Bruins RW Nathan Horton missed his third straight game with a hand injury. ... Tampa Bay D Matt Carle, C Nate Thompson and G Ben Bishop were named the United States roster for the World Championships - set to begin May 3 in Finland and Sweden.