Giordano, who becomes the Flames' 19th captain in franchise history, is entering his eighth season with the Flames. Last season he had four goals and 11 assists for 15 points in 47 games played.
Giordano takes over from Jarome Iginla who was traded to the Pittsburgh Penguins at the end of last season.
The Flames are clearly in a rebuilding mode and will rely on Giordano to guide the Flames' defensive core.
The Flames meanwhile are in the middle of their preseason. So far the Flames are 3-2. They have beaten the New York Islanders twice, split games with the Edmonton Oilers and lost to the Ottawa Senators.
Their next preseason contest is Monday against the New York Rangers at the Scotiabank Saddledome. Game time is 7:00 p.m.