Zan started his career with Hatayspor and then moved on to Çanakkale Dardanelspor before joining Beşiktaş in 2003. He needed time to make his mark with the Turkish giants, and spent a spell on loan with Gaziantepspor before returning to the İnönü Stadium.

Following 2008–09 season-end, Zan could not negotiate a deal with Beşiktaş. On 22 June 2009, it had been announced that Zan made a deal with Galatasaray for a period of 2 years starting from 2009–10 season. In further rumours, it has been written on papers that Zan had never been called by Beşiktaş in order to negotiate after his contract had been expired, which was dealt for two years within an optional second season. After 20 days with no proposal from the club, Zan have accepted Galatasaray’s offer.

On 27 June 2011, Zan signed a new contract, with €700,000 per annum wage plus €20,000 per game. He scored his first goal for the club on the second half of the 2010–11 Süper Lig season which came in the first half as the game ended in a 1–1 draw against Kayserispor. Zan played 12 matches on the 2011–12 Süper Lig season and scored 2 goals, one against Eskişehirspor in 2–0 win and the other in a 4–0 win against Ankaragücü. He was part of Galatasaray’s champion squad.