Mark Giordano (born October 3, 1983) is a Canadian professional ice hockey defenceman who currently serves as captain of the Calgary Flames of the National Hockey League (NHL). An undrafted player, Giordano signed with the Flames as a free agent in 2004 after playing two seasons of major junior hockey with Owen Sound Attack of the Ontario Hockey League (OHL). Since making his debut in 2006, Giordano has played his entire NHL career with the Flames but left the team for one season, 2007–08, to play for Dynamo Moscow of the Russian Super League.
Praised for his leadership, offensive, and defensive skills, Giordano is one of the Flames' top defencemen and was named to play his first NHL All-Star Game in 2015. The Flames have also honoured him for his charitable contributions; he was named recipient of the J. R. "Bud" McCaig Award in 2012. Internationally, Giordano played with Team Canada at the 2010 IIHF World Championship and was a member of the 2007 Spengler Cup winning team.