|Date of birth||10 April 1965|
|Place of birth||Munich, West Germany|
|Date of death||12 February 2008(aged 42)|
|Place of death||Unterhaching, Germany|
|Height||1.79 m (5 ft 10 1⁄2 in)|
|FC Bayern Munich|
|* Senior club appearances and goals counted for the domestic league only.
Grosser came to SpVgg Unterhaching in 1983; before he played in the youth department of FC Bayern Munich and TSV Forstenried. In 1989, he became a midfield player with Unterhaching from Bavaria League in the 2. Bundesliga and completed the season 1989–90 (26 games) with one goal for his club. After his active career, he worked for ten years as coach of the seniors B, and was also a committed youth coach.
- "Grosser, Thomas" (in German). kicker.de. Retrieved 10 June 2012.