Career
Groß began his career with Astoria Walldorf before joining 1899 Hoffenheim in January 2011. He spent eighteen months playing for the reserve team, and had a successful 2011-2012 season, scoring 14 goals. In July 2012 he signed for 1.
Football Club Heidenheim of the 3.
After half a season with Heidenheim, he joined Stuttgarter Kickers on a six-month loan in January 2013 before being released by Heidenheim at the end of the loan. He returned to Football Club Astoria Walldorf shortly afterwards and helped them earn promotion to the Regionalliga Südwest shortly afterwards.