Kadri put Calgary up 1-0 at 8:57 of the first period when he stripped Dmitry Kulikov of the puck, deked backhand to forehand and slid the puck by Knight's right pad.
Backlund scored at 11:34, but the goal was disallowed after video review confirmed he directed the puck into the net with a distinct kicking motion.
"I just had a feeling it was a kicking motion, but I realized I had to celebrate too," Backlund said. "It was nice to get one eventually."
Coleman made it 2-0 at 19:05 of the second period when he shot five-hole off the rush, and Backlund pushed it to 3-0 at 6:17 of the third period when he beat Knight glove side from just inside the left face-off circle.
Backlund's goal, his first in 15 games, came after Wolf made a blocker save on Sam Bennett's breakaway at 4:54.
"That's huge," Coleman said. "It was my turnover, so it's really huge. That's the kind of goalie he is, especially at home this year. He's just been lights out. If you make a mistake, he's there and he's got your back. He makes that save and ‘Backs’ puts it away. That's the way the game goes. You could be looking at a different situation if they found a way to get one there. He just looked really confident and collected all night and makes everything look pretty easy."