He started out with the Star Bulls Rosenheim from 2000 to 2002 and then joined the Eisbaren.
Busch played for Germany in the following:
- 2005 World Junior Ice Hockey Championships
- 2006 Olympics
- 2006 World Championship
- 2007 World Championship
- 2008 World Championship
In March, 2008, Busch refused to take a surprise doping test, citing privacy issues. The matter has been going through the system ever since. He has been suspended but the courts have delayed that suspension and Busch is free to play in Germany but not in international competitions.