Career
Grüttner began his career playing amateur football in Baden-Württemberg before joining SSV Ulm 1846 of the Regionalliga Süd in 2009. Liga. He made his debut at this level on July 31, 2010 as a substitute for Elia Soriano in a 2–1 defeat to TuS Koblenz, but he only scored once in eighteen appearances in the 2010-2011 season. Grüttner finished as the third top scorer of the 2012-2013 3.
Liga with 18 goals as the Kickers survived relegation, finishing 17th.
On 1 July 2013, Grüttner moved to VfB Stuttgart II, and on 10 April 2013 he signed a contract that would keep with the team through June 2016. Regionalliga Süd: 2010, 2012.
