Answer
In 2016, Metzelder played his last amateur game. This was a friendly match between his former club Borussia Dortmund and 1. FC Köln. Metzelder played for Dortmund, and scored a goal in the 2-1 win. He retired from professional football in 2012, after a career that included spells at Borussia Dortmund, Real Madrid, and Schalke 04.