Hansjacob Mattsson competed in hockey for Sweden at the 1920 Antwerpen Olympics. He was initially a bandy player. Mattson skated for Berliner SC in Germany. He owned a paintshop in Gävle, and later served as a board member for the newspaper Gefle Dagblad.
|Games||Discipline (Sport) / Event||NOC / Team||Pos||Medal||As|
|1920 Summer Olympics||Ice Hockey (Ice Hockey)||SWE||Hansjacob Mattsson|
|Ice Hockey, Men (Olympic)||Sweden||4|