Giordano extended the lead to 3-0 on the power play at 16:47, and Quine made it 4-0 on a rebound at 18:25.
"I think our special teams carried the play tonight," Giordano said. "That was a big difference in the game. We had a real good first period, we were moving it. After that, it's tough because teams take a lot of chances. I thought they had a good cycle going, but we kept them to the outside for the most part."
Sundqvist scored for the Blues at 2:29 of the second period to make it 4-1, but Gaudreau made it 5-1 at 5:26.
Bozak cut it to 5-2 at 18:14.
"You've got to go out there with some pride and jump back in the game," Blues coach Craig Berube said. "I thought in the second, we did a little bit. We pushed and ended up getting a couple goals. In the third, there was nothing, and you've got to have a lot more pride than that. If you don't have more pride than that, then you're not going to go anywhere."
Gaudreau scored his second of the game into an empty net to make it 6-2 at 16:53 of the third period, and Quine scored a power-play goal at 18:44 to make it 7-2.