Career
Castro made his debut in professional football, being part of the Remote Control Genk squad in the 2000-2001 season. He also played for Sint-Truidense VV before joining Roda JC. Roda JC
At Roda, Castro was the number one goalkeeper for 3 seasons. On 30 October 2007, Castro scored the equalizer (2–2) in the dying seconds of the KNVB Cup 2007-2008 third round tie against De Graafschap.
In December 2009 Castro was involved in a fight with fellow teammember Anouar Hadouir, who hit Castro in the face.
Hadouir was fined by the club but Castro would lose his place between the goalposts soon after and was released by Roda at the end of the season. On 1 October 2010, Castro joined PSV Eindhoven for the 2010/2011 season.
After 1 season at PSV Eindhoven he played 1 season for Sint-Truidense VV, 2 seasons for MVV Maastricht and in the summer of the 2014/2015 season he signed a 2 year long deal with Dutch Eredivisie team Heracles Almelo.