Darryl Sutter stepped down Tuesday as general manager of the Flames, who are next to last in the Western Conference with a 16-18-3 record.
Jay Feaster was named acting general manager by the team.
"Darryl has performed valuable service to the Calgary Flames organization for 8 years," team president Ken King said in a statement. "We thank Darryl for his leadership and his important contributions to re-establishing the Calgary Flames as a model franchise."
Sutter Steps Down As Calgary's GM