Career
He is currently playing with the Djurgårdens IF of the Swedish Hockey League. Ollas Mattsson was selected by the Calgary Flames in the sixth round (175th overall) of the 2014 National Hockey League Entry Draft.
He is currently playing with the Djurgårdens IF of the Swedish Hockey League. Ollas Mattsson was selected by the Calgary Flames in the sixth round (175th overall) of the 2014 National Hockey League Entry Draft.