Erik Sven Gunnar Karlsson (pronounced [ˈêːrɪk ˈkɑ̌ːɭsɔn]; born 31 May 1990) is a Swedish professional ice hockey defenceman and alternate captain for the San Jose Sharks of the National Hockey League (NHL). Karlsson was drafted in the first round, 15th overall, by the Ottawa Senators at the 2008 NHL Entry Draft, with whom he spent his first nine NHL seasons. Karlsson is a two-time winner of the James Norris Memorial Trophy as the NHL's best defenceman, winning the award in 2012 and 2015.