He was part of the German quadruple sculls team at the 2008 Summer Olympics, with René Bertram, Hans Gruhne and Christian Schreiber.

In 2009, he won the gold medal in the men's double sculls with Eric Knittel at the 2009 World Championships.

[2] In 2011, Krüger and Gruhne won silver in the men's double sculls at the World Championships in Bled.

[3] At the 2012 Summer Olympics, he competed in the men's double sculls with Eric Knittel, finishing in 9th.

[4] At the 2016 Summer Olympics in Rio de Janeiro, he competed in men's double sculls with teammate Marcel Hacker.