Krüger was announced as the first of four nominees for the 2009–10 Elitserien Rookie of the Year on 18 October 2009[2] after starting the season with five goals and 11 assists in just 13 games.

[7] Krüger recorded his first career regular season assist and point on 8 October 2011 in a 5–2 win over the Dallas Stars on a goal scored by Dave Bolland.

[9] On 9 May 2013, in Game 5 of the Western Conference Quarter-finals, Krüger scored his first career Stanley Cup playoff goal, which happened to be the game-winner and series-winner against Minnesota Wild goaltender Josh Harding.

[18] After completing his seventh season with the Blackhawks, Krüger was long rumored as a candidate to be traded away due to considerable salary cap constraints.

[19] On 4 July 2017, Krüger was then moved on by the Golden Knights in a trade to the Carolina Hurricanes for a 5th-round pick in the 2018 NHL Entry Draft.

[25] Following the 2018–19 season, Krüger ended his nine-year career in the NHL, returning to Europe as a free agent in signing a two-year contract with Swiss club ZSC Lions of the NL on 5 July 2019.

After several injuries to the team's centremen, Krüger played on Sweden's first line in the tournament final against Canada, which the Swedes lost 3–0.