On July 9, 2010, He signed an offer sheet with the San Jose Sharks which was for 4 years and $14 million. The Blackhawks matched it and Hjalmarsson became the first defenceman in 13 years to receive an offer sheet as a restricted free agent. On June 24, 2013, He won his second Stanley Cup with the Blackhawks after they defeated the Boston Bruins 4 games to 2 in the 2013 Stanley Cup Finals.