Matt Bartkowski was signed by the Flames during the 2016-17 season in order to meet expansion draft requirements. He fulfilled his role admirably. Then, in 2017-18, he played 18 games.
2017-18 season summary
Bartkowksi dressed in the first seven games of the season, back when the Flames refused to trust Brett Kulak for some reason. Once Kulak got into the lineup, though, for the most part, he stuck. Of the remaining 11 games Bartkowski played, four were because the Flames decided to sit Kulak at various points in October, November, December, and February.
The other seven times Bartkowski dressed, it was because Travis Hamonic was injured; or because it was the final four games of the season, the Flames had long been eliminated from the playoffs, and Hamonic and TJ Brodie were both injured and nobody else was available to dress at all.