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. Predicted to finish near the bottom of the standings before the season, 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. His plus-minus of +14 ranked him second in the league. The NHL recognized Giordano's early season play by naming him its First Star of the month of November. He was subsequently named as the Flames' representative at the 60th National Hockey League All-Star Game. Giordano played his 500th career game on February 2, 2015, in a victory over the Winnipeg Jets. He set a personal best by scoring his 48th point of the season in a 3–1 win over the New Jersey Devils on February 25, but also suffered an injury in the game. 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. In the summer before the 2015–16 season, the Flames signed Giordano to a six-year contract extension.