 Pröpper started his career with local amateur club VDZ, where he was coached by his father, Peter, before progressing through Vitesse's academy.He made his Eredivisie debut on 17 January 2010 in a match against NEC at Stadion de Goffert, coming on as a substitute for Kevin van Diermen in the 84th minute.He made his first appearance in the starting line-up on 13 April 2010, in a match against NAC Breda at the GelreDome.