Rask has made 21 NHL appearances over three seasons and this was his third career shutout.
Boston won for the fourth time in five games and will be the host Friday for the 2010 Winter Classic. The Bruins will meet Philadelphia at Fenway Park.
Atlanta starter Ondrej Pavelec gave up three goals on 10 shots in just under 17 minutes. Johan Hedberg finished the game and made 19 saves in Atlanta's sixth straight loss.
Ray Liotta sues skin care company over use of likeness
NBC reportedly holds celebs hostage to Jimmy Fallon's show