Answer
De Rosario played for the German club FSV Zwickau. He was a member of the team from 2000 to 2002. During his time with the club, he made 55 appearances and scored 11 goals. De Rosario was a key player for the team, helping them to promotion to the second division in 2001. He left the club in 2002 to join the New York Red Bulls of Major League Soccer.