K.S.C. Lokeren Oost-Vlaanderen
Peeper made his debut in the Eredivisie in the 1985–86 season, appearing in 24 games for Haarlem and going scoreless in the process. With Lokeren, after three years in the Belgian Second Division with K.S.C. Lokeren Oost-Vlaanderen, he helped them to the 12th position in the 1996–97 edition of the Pro League.