He also holds United States citizenship. Ferenčina spent his entire career playing for Croatian clubs and he had spells at Dinamo Zagreb, Trešnjevka, Inter Zaprešić, Marsonia and Hrvatski Dragovoljac before coming to Slaven Belupo in 1997. Ferenčina is mainly remembered for his time at Slaven, where he spent the last 8 years of his playing career, appearing in a total of 172 matches and scoring 11 goals for the club
Ferenčina retired from football in February 2005 after a fallout with Slaven manager Branko Karačić during the club"s winter break friendly game at the Andrija Anković Memorial Tournament.
In the 2006-2007 season Ferenčina worked at Slaven Belupo as assistant manager to Elvis Scoria. In January 2008 he was appointed manager of NK Lokomotiva youth team
He then served as assistant manager at Lokomotiva for three months in early 2009, before being appointed as the club"s manager in April 2009, replacing Željko Pakasin. Led by Ferenčina, the club gained promotion to Prva HNL first time in their history at the end of the 2008-2009 season, and then went on to finish 8th in the 2009-2010 Prva HNL.