Jake Allen made 34 saves for the Blues.
Hamhuis scored 2:09 into the game, and Spezza made it 2-0 at 15:12 of the first period, when the Stars outshot the Blues 16-8. Dallas had 30 shots on goal by the end of the second period.
Elie (4:56) and Janmark (15:50) scored in the third.