Hans-Jacob Mattsson
Appearance
![](http://upload.wikimedia.org/wikipedia/commons/e/ea/Hansjacob_Mattsson.jpg)
Hans-Jacob "Knubben" Mattsson (June 2, 1890 – December 1, 1980) was a Swedish ice hockey player who competed in the 1920 Summer Olympics.[1]
In 1920 he was a member of the Swedish ice hockey team which finished fourth in the Summer Olympics tournament. He played one match.