|Full name||Ferdinand Rudols Marcel Vierklau|
|Date of birth||1 April 1973|
|Place of birth||Bilthoven, Netherlands|
|Height||1.78 m (5 ft 10 in)|
|Playing position||Right back|
|* Senior club appearances and goals counted for the domestic league only.
In his country, Vierklau played for FC Utrecht (1991–96), Vitesse Arnhem (1996–97) and AFC Ajax (March 1999 – 2002), appearing in 185 Eredivisie games over the course of 11 seasons and scoring five goals. With the Amsterdam club he won the double in the 2001–02 campaign, but was already a fringe player at the time.
Vierklau gained two caps for the Netherlands, in a period of eight months. His debut was on 5 October 1996, as he played 71 minutes in a 3–1 away win against Wales in the 1998 FIFA World Cup qualification stages.