William Karlsson is a Swedish professional ice hockey center whose career has included several moves across the NHL and earlier development in Sweden. He was selected by the Phoenix Coyotes in the second round of the 2011 NHL Entry Draft after playing for Frölunda HC in the Swedish Hockey League. Karlsson later joined the Coyotes organization, was traded to the Columbus Blue Jackets in 2014, and then moved again in 2017 to the Vegas Golden Knights.
Internationally, Karlsson has represented Sweden in major tournaments, including the 2014 Winter Olympics and the 2017 IIHF World Championship. His progression from Swedish league hockey with Frölunda HC to multiple NHL franchises highlights a career marked by movement across teams and consistent selection at the national level. His appearances on the international stage reflect his role among Swedish centers competing at the highest levels of the sport.