Born in Amsterdam to Indo (Eurasian) parents, Mols, a product of local Ajax's youth system, never appeared officially for its first team, making his professional debuts in the second division, with Cambuur, which he helped obtain Eredivisie promotion in 1992.

However, during a UEFA Champions League clash against Bayern Munich, he collided with opposing goalkeeper Oliver Kahn, which resulted in a serious knee injury[1] – in the same competition, he previously helped his club crush PSV Eindhoven 4–1 at home by scoring twice, whilst in the league, he put four past former Ranger Andy Goram's Motherwell.

[4] In the following years, Mols endured a tough rehabilitation process,[5][6] eventually recovering fully and scoring 13 times in 27 matches during the 2002–03 championship-winning season, which earned him a one-year extension in his contract.

[7] In December 2002, he notably scored the winner in the Old Firm contest against Celtic (3–2),[8] and left club and country in June 2004, having collected a total of five trophies.

[9] After an unassuming year with Utrecht, Mols signed with ADO Den Haag, where he played two seasons and netted eight league goals combined.