De Graafschap
Duits started playing football with amateurs SDC Putten and he was soon signed to the youth team of Vitesse. In 1999, De Graafschap picked him up. He made his debut in professional football as a part of the De Graafschap squad in the 2002–03 Eredivisie season, in which De Graafschap relegated. When relegation was a fact, Duits became a regular starter in Frans Adelaar's side. After promoting back to the Eredivisie, and Gert Kruys becoming manager, Duits played less. He was even put in the reserve team for a short period. De Graafschap once again relegated, and Kruys left the club. He was still no regular, as De Graafschap signed players like Joost Volmer and Dave Bus breaking through – both players for his position.