"He really fits our DNA as a guy who's ultra-competitive," Treliving said. "We think he can touch a bunch of different parts of the game, he gives us more depth and we're excited to add him."
Jarnkrok was amped to join Lindholm - and good friend Jacob Markstrom - on a Flames side with their sights set on a Stanley Cup.
"Super excited," he said. "I've been watching a lot of games this year when Calgary's been playing. Played against them a couple times. They're a very good team, very hard to play against.
"I'm super excited to be part of the Flames."
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Speaking of the postseason push, the Flames had that aforementioned game to play as they looked to increase their lead atop the Pacific Division.
And they did just that, skating to a 6-3 victory. They are now 15-1-1 in their last 17 outings at home.
Brett Ritchie scored his first of the season to get his side started, with Andrew Mangiapane adding his 30th of the year in the first period as the Flames led 2-1 after 20 minutes.
They added three more quick in the second from Dillon Dube, Matthew Tkachuk and Milan Lucic to run away with it. Johnny Gaudreau added a late empty-netter.
Markstrom got the start in net, making 30 saves.
Nico Daws started for the Devils but was later pulled after allowing four goals on 19 shots, replaced by former Flame Jon Gillies in the second. He stopped 16 of 17.
It was the seventh time this season the Flames have chased an opposition netminder to the bench.
Nikita Zadorov went to the box at 5:22, whistled for hooking young Devils star Jack Hughes.
The best chance on the man-up for the visitors came as the penalty expired, Yegor Sharangovich sending a cross-crease pass to Dawson Mercer down low and in tight, Markstrom stopping the initial offering with a stellar save and then a few more whacks at it from Mercer. It was his first of many big stops in the tilt.
Ritchie opened the scoring at 9:43, skating up into the high slot and turning to fire one short-side past Daws, who had Lucic parked on his doorstep causing havoc.
Dube and Oliver Kylington got the helpers.