Derelioğlu played as a forward and is notable for his goal for the Turkey national team against Belgium during the qualifying rounds of the 1998 FIFA World Cup.
[6] Derelioğlu made his debut on 29 August 1993, starting alongside the likes of Feyyaz Uçar, Sergen Yalçın, and Rıza Çalımbay.
Derelioğlu was the subject of controversy with the Spanish club, getting into a physical altercation with then-captain Vinny Samways during a training session.
[6] At the end of the season, Derelioğlu moved abroad for a second time, but returned to Turkey during the winter transfer window.
[8] Derelioğlu moved back to Turkey during the winter transfer window and made 18 appearances for four different clubs in two-and-a-half seasons.
[6] Derelioğlu finished his career with his first club, Fatih Karagümrük, scoring one goal in four matches.