Mark Giordano was born March 10, 1983 in Toronto, Ontario. A free-agent signing of the Calgary Flames in the summer of 2004, Giordano is a graduate of the OHL's Owen Sound Attack.
An offensive defenseman in junior, Giordano played two seasons in Owen Sound registering 97 points (32-65-97) before going on to make his professional debut with the AHL's Lowell Lock Monsters in 2004-05. Following a strong season with Lowell, Giordano joined the Flames organization in the summer of 2005 and went on to spend the better part of the 2005-06 season with the club's AHL affiliate in Omaha while seeing his first NHL action with the parent club.
On the international stage, Giordano represented Canada at the 2010 World Championships.
Giordano would appear in all 82 games for the Flames during the 2010-11 season, recording eight goals and 35 assists. He proved to be the Flames most trusted defender at both ends of the ice and established himself as a favourite of fans and teammates alike.
On September 20, 2013, Giordano was named the 19th captain in Calgary Flames history. He earned praise from Flames management for his work ethic and his willingness to defend his teammates.
Injuries would limit Giordano to just 64 games during the 2013-14 season, but he would manage to produce impressive offensive totals. With 14 goals and 33 assists, Giordano would finish the season as the 11th highest scoring defenceman despite missing almost 20 games.
Upon returning from injury, Giordano would re-take his spot as one of the NHL's best defensemen when he was named to the NHL All-Star game for both 2015 and 2016.