Simplify the following text for a Grade 8 native English-speaking person.
Original: Christoph Tobias Metzelder ( born 5 November 1980 in Haltern , North Rhine-Westphalia ) is a German footballer who plays for FC Schalke 04 , as a central defender .
Simplified: Christoph Metzelder ( born 5 November 1980 in Haltern , Germany ) is a German football player .