Complex sentence: His professional football debut for Gençlerbirliği was on 25 May 2003 against Samsunspor and then he played on loan contract with Mardinspor in 2006 and Hacettepe in 2005 and between 2006-09.
Split into simpler sentences: His professional football debut for Gençlerbirliği was on 25 May 2003 against Samsunspor. He played on loan contract with Hacettepe in 2005, Mardinspor in 2006 and Hacettepe again between 2006-09.