[3] He taps his helmet twice with his stick at the end of the national anthems before each game as a quiet tribute to his sister, whose death had a lasting impact on Giordano and his family and brought them closer together.

[7] As a 19-year-old rookie, Giordano recorded 48 points for Owen Sound in 2002–03 and, as one of the top first-year players in the league, was named to the OHL First All-Rookie Team.

He accepted an invitation to attend the Phoenix Coyotes' training camp where, according to then-Owen Sound General Manager Mike Futa, Giordano impressed team officials but believed that he would be best served by playing a second season in the OHL.

After graduating from junior hockey, Giordano enrolled at York University and planned to study at its school of business when he received a late invitation from the Calgary Flames to attend their summer camp.

[1] Former Flames coach Jim Playfair recalled that Giordano stood out among the group of invitees and said that his skill and skating ability set him apart: "Darryl (Sutter) met with three or four of those kids and gave them all the same contracts: Three years in the American League, and if it works out for you, you've got a career.

[10] The Flames assigned Giordano to their American Hockey League (AHL) affiliate, the Lowell Lock Monsters, for the 2004–05 season where he scored 6 goals and added 10 assists in 66 games.

[7] Unable to come to terms on a new contract with the Flames prior to the 2007–08 season, Giordano left the NHL to sign with HC Dynamo Moscow of the Russian Super League.

[13] The Canadian national team named him an alternate at the 2008 IIHF World Championship in case of injury to a roster player,[14] however he never appeared in a game.

Though he feared his decision to leave for Russia would damage his relationship with the Flames, Giordano and the team came to terms on a three-year contract that brought him back to Calgary for the 2008–09 season.

[11] Despite having the option to become an unrestricted free agent following the 2010–11 season, Giordano opted to remain in Calgary and signed a five-year, $20 million contract extension with the Flames on October 29, 2010.

[25] Head coach Bob Hartley praised Giordano's influence on his teammates as the rebuilding Flames team established an identity as a squad which was noted across the league for its work ethic.

[29] A surge in offensive production from Giordano and fellow defencemen T. J. Brodie and Dennis Wideman resulted in the Flames being one of the NHL's biggest surprises early in the 2014–15 season.

[30] Predicted to finish near the bottom of the standings before the season,[31] the Flames instead began December with one of the best records in the league, in large part due to the play of Giordano, who led all NHL defencemen with 25 points, four better than Brodie.

[35] The Flames announced one week later that he required surgery for a completely torn biceps tendon; the estimated recovery time of four to five months meant that his season was over.

[44] Prior to the start of their inaugural season, Giordano was named the first captain in Kraken franchise history alongside alternates Adam Larsson, Yanni Gourde, Jordan Eberle, and Jaden Schwartz.

[47] However, after testing positive for COVID-19 prior to a game against the Tampa Bay Lightning, Giordano spent 10 days isolated in a hotel before returning to the Kraken lineup on December 10.

[51] Giordano continued his strong play in Toronto as the team qualified for the post-season, although ultimately lost in the first round to the two-time defending cup champion Tampa Bay Lightning.

The deal was seen by analysts as a significant hometown discount for the cap-strapped club, several million dollars less than what Giordano would likely fetch in the summer offseason from competing teams.

[57] The team honoured him for his work with Habitat for Humanity and the Flames Foundation for Life by naming him the recipient of the J. R. "Bud" McCaig Award in 2012.