 Seriously injured during the summer, he spent the entire 2009–10 and 2011–12 campaigns on the sidelines, eventually leaving the Andalusians on 30 June 2012 after his contract expired.In June 2007, De Mul earned his only two caps for Belgium at senior level during the UEFA Euro 2008 qualifiers, making his debut on the 2nd as a 61st-minute substitute for François Sterchele in a 1–2 loss to Portugal at the Stade Roi Baudouin in Brussels.He started four days later, in a 0–2 defeat in Finland.