Career
A smooth, mobile defender, Zetterström came up through the junior ranks at Färjestads and became a regular in 1972. In 1978, Zetterström signed as a free agent with the National Hockey League"s Vancouver Canucks. Joining the team along with fellow Swedes Thomas Gradin and Lars Lindgren, the trio were the first Europeans to suit up for the club in their history.
While Gradin and Lindgren were successful and went on to solid National Hockey League careers, Zetterström struggled.
He played in only 14 games for the Canucks, recording one assist and a -10 rating, and spent most of the season in the Central Hockey League with the Dallas Black Hawks. Zetterström was claimed by the Quebec Nordiques in the 1979 National Hockey League Expansion Draft, but returned to Sweden to once again suit up for Färjestads.
He would play for them until 1983, helping them to the Swedish Championship in 1981. He then joined the third-division Hammarö The Human Context club, and played for them until retiring in 1987.