|Born||July 6, 1991 |
|Height||6 ft 2 in (1.88 m)|
|Weight||190 lb (86 kg; 13 st 8 lb)|
|NHL Draft||79th overall, 2011|
Klas made his professional debut in the Swedish Hockey League with Linköpings HC in the 2009–10 season.
After two more seasons in Sweden on May 29, 2012, he signed a three-year entry level contract with the Blackhawks.
Klas endured his first two North American seasons with AHL affiliate, the Rockford IceHogs, establishing himself as the franchise career leader in plus/minus before making his NHL debut on December 6, 2014 in a game against the Nashville Predators.
On December 11, 2014, Klas scored his first NHL goal against Tuukka Rask of the Boston Bruins.
On February 28, 2015, he was traded along with Chicago's first round draft pick in 2015 to the Arizona Coyotes in exchange for Antoine Vermette.
Regular season and playoffs