Career
Groß played his first fully professional match in the Bundesliga for 1899 Hoffenheim on 2 May 2009 in a 0–4 loss against VfL Wolfsburg. He was substituted on in the 89th minute for Chinedu Obasi. In January 2011, he transferred to Karlsruher South Carolina along with Hoffenheim teammate Marco Terrazzino.
His father, Stephan, was also a football player who played for Karlsruher South Carolina in the Bundesliga.