[2] Sjöberg scored three goals during the season[3] and helped the club finish second in the league, seven points behind IK Frej.

In 2013 the Chill were crowned regular seasons champions of the PDL[9] and advanced to the final match in which they lost to the Austin Aztex.

[14] On the night before the draft, Major League Soccer analyst Jonathan Yardley described Sjöberg as the most MLS-ready defender available.

He started the eventual 0–0 draw with the Philadelphia Union and was credited with keeping the defense organized after the Rapids went down a man in the 68th minute.

About Sjöberg being a starter, Rapids head coach Pablo Mastroeni said, "It wasn't a part of the plan but that's why we do preseason.

These two guys (Sjöberg and fellow rookie Dominique Badji) have proven that they're fully capable and ready to contribute to the team right now.

The game-winning goal secured ensured that Colorado moved back atop the overall Major League Soccer standings after being displaced momentarily by FC Dallas who were victorious earlier in the matchday.

[22] On 6 March 2020, Sjöberg joined USL Championship club San Antonio FC on loan for the 2020 season.