Wassey began his career in his hometown for ESV Münster in 1996[1] and signed for VfL Wolbeck in June 2001.[2] After spending two years in VfL Wolbeck's youth squad, Wassey was scouted by Preußen Münster in the summer of 2003. After playing for only half a year, Wassey joined the youth squad of Rot-Weiss Ahlen in January 2004,[3] and then signed a youth contract for VfL Wolfsburg in July 2005.[4]
^Buschmann, Heiko (9 February 2010). "Schalke II: Spiele in USA und auf Jamaika" [Schalke II: Games in the USA and Jamaica]. Reviersport (in German). Retrieved 3 November 2023.