 He began his professional career with national powerhouse ŠK Slovan Bratislava and, in January 2002, signed with Bursaspor from Turkey.After returning to his country and Slovan, Kelemen soon joined Latvia's FK Ventspils.In the summer of 2004, he embarked in a Spanish adventure that would last three years, as he represented CD Tenerife and UD Vecindario, both in the Canary Islands and Segunda División.