After four years in the amateur division of the 1st FC Nuremberg Kulabas moved to third league season 2010/11 1 FC Heidenheim. His professional debut came on 11 September 2010, when he was a substitute in the home game against Wehen in 67 minutes on the seventh match day.
On 20 January 2011, the first FC Heidenheim announced Kulabas rent until end of season 2010/11 to the third division Eintracht Trier, since he was so far came in the 3rd league only brief appearances. After seven goals in 14 games back round the attacker signed in summer 2012 a new one-year contract at Eintracht. For the Trier Kulabas posted on 30 July 2011 at the first round of the DFB Cup against FC St. Pauli 1-0 lead, thus laying the foundation stone for the 2-1 win. In the season 2011/12 he came up with 35 inserts and 13 goals.
For the 2012/13 season Kulabas was obliged by the third division Wacker Burghausen.