St-Denis, 28, spent last season with the Blue Jackets' American Hockey League affiliate in Springfield, where he scored nine goals and 26 points in 60 games. The Quebec native started his NHL career with the Montreal Canadiens organization in 2008-09 before signing with Columbus as a free agent in 2013.
In 17 games with Montreal during the 2011-12 season, St-Denis scored one goal and three points with 10 penalty minutes and a plus-3 rating.
You could see out there that everybody was willing to compete, to sacrifice, even blocking shots to the end. Even in the third when we were up 5-0, guys were still working hard and blocking shots That's a nice feeling also for the future.
— Flames goalie Jonas Hiller after his team's 5-0 win over Carolina