His talent was recognized by coach Joshua Clemas, at various tournaments, and he finally landed on the junior team for Frölunda HC.

A year later, Eriksson would post five goals and nine assists in 39 games, helping Frölunda win the Swedish ice hockey championship (SM-guld).

Prior to the following season, on 2 October 2009, he was recognized as a significant offensive force of the Stars attack by re-signing to a six-year contract extension worth $25.5 million.

On 4 July 2013, Eriksson, along with prospects Joseph Morrow, Reilly Smith and Matt Fraser, was traded by the Stars to the Boston Bruins in exchange for Tyler Seguin, Rich Peverley and Ryan Button.

[3] In an injury-marred first season in Boston, after two concussions on separate hits from John Scott of the Buffalo Sabres and Brooks Orpik of the Pittsburgh Penguins, Eriksson would finish the 2013–14 season with 10 goals and 27 assists for 37 points in 61 games, finding chemistry with centre and fellow Swede Carl Söderberg.

[6] On 5 March 2017 Eriksson suffered a season-ending knee injury after a collision with Anaheim Ducks forward Chris Wagner.

After going unsigned through by any other NHL team, Eriksson re-signed with Frölunda on 10 November 2022, marking his return to the SHL after 17 years in North America.