Berglund's two most noticeable assets are his hockey sense and skating ability. He is an extremely smart player who makes smart decisions and usually delivers excellent passes. When it comes to his mobility, he has good overall speed and also accelerates well. Although perhaps a bit more noticeable in the offensive zone, Berglund definitely contributes both ways and is smart and rather solid in his own end.

He is of smallish stature and does not play overly physical, but compensates this by solving tricky situations with his on-ice vision and puck handling skills. To take his game to the next level, the already all-around defenseman needs to add more strength.
- Elite Prospects (2009)

Father: Rolf Berglund
Brother: Oskar Berglund