[4] On October 18, 2010, after playing one game with the Stingrays, Gustafsson informed the Capitals that he no longer wished to continue his career in North America and returned to Europe.

Gustafsson then returned to the SCL Tigers for a second stint, playing under his father and helping the club win the 2015 NLB championship and move back to the NLA.

Midway through the 2015-16 campaign, which he again spent with the SCL Tigers, Gustafsson inked a two-year deal with fellow NLA side HC Fribourg-Gottéron, starting with the 2016-17 season.

[7] He parted company with Fribourg-Gottéron in December 2016 for personal reasons[8] and signed with Färjestad BK of the Swedish Hockey League shortly after leaving Switzerland.

[9] At the conclusion of the 2016–17 season, Gustafsson moved back to Switzerland for a second stint with NLA side SCL Tigers, signing a two-year deal in April 2017.