The Flames had their three-game winning streak snapped Friday night, falling 6-0 to the Ottawa Senators at the Scotiabank Saddledome.
Cody Ceci, Derick Brassard, Mike Hoffman, Mark Stone, Ryan Dzingel and Chris Wideman scored for the visitors, while Craig Anderson made 25 saves for the shutout.
Ottawa went 2-for-7 with the man advantage as Calgary fought penalty troubles all night.
"The rash of penalties took us out of it and our penalty kill couldn't save us," said Flames coach Glen Gulutzan.
Ceci opened the scoring with just 44.8 seconds left to play in the first period when he skated hard into the zone on a 3-on-2 and took a pass from Tom Pyatt and backhanded it five-hole past Smith.
It was another late goal - with just 1:17 left in the second stanza - that put Ottawa up by a pair.
Just as a Senators powerplay expired, Brassard's wrister from the left faceoff circle beat a screened Smith low glove-side.
With Jaromir Jagr in the box for hooking, it was another No. 68 - Mike Hoffman - who scored with an absolute laser of a one-timer that beat Smith high, glove-side.
Stone added another powerplay marker by whacking in a rebound that had fallen in the crease before Dzingel made it 5-0.
Mike Smith stopped 17 of 22 shots he faced before being replaced by Eddie Lack after Ottawa's fifth goal.
Wideman rounded out the scoring with a shot from the top of the face-off circle that found the back of the net behind Lack, who finished with five saves on six shots.
ONE-TIMERS: Then Toronto Maple Leaf Matt Stajan made his NHL debut on April 5, 2003 against the Ottawa Senators and scored his first career goal … Speaking of first NHL goals against the Senators, Sam Bennett turned the same feat on Oct. 28, 2015 with his first regular-season tally … Sticking with this Ottawa angle, Jagr surpassed the 1,000-point plateau on Dec. 30, 2000 vs. the Sens.
NEXT UP: The Flames head to the Left Coast for a Saturday night tilt with the Vancouver Canucks (8 p.m., TV: Sportsnet; Radio: Sportsnet960 The FAN). The team will get a four-day break before hosting the Carolina Hurricanes at the Scotiabank Saddledome (7 p.m., TV: SportsnetFlames, Radio: Sportsnet960 The FAN).