|Full name||Stefan Deak|
|Date of birth||23 March 1991|
|Place of birth||Ruma, FR Yugoslavia|
|Height||1.91 m (6 ft 3 in)|
|Playing position||Centre back|
|2012||-> Hapoel Rishon LeZion (loan)||11||(1)|
|2012-2013||-> BFC Siófok (loan)||14||(0)|
|2013-2014||Deportivo La Coruña||0||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 22:29, 21 April 2019 (UTC)|
Deák made his senior debuts with local FK Veternik in 2009. In January 2010, he signed with PFC Spartak Nalchik, being assigned #23 jersey. However, he failed to appear with the club, only being on the bench in a match against FC Zenit Saint Petersburg on 3 October.
On 21 January 2011, Deák signed a four-and-a-half-year deal with Deportivo de La Coruña, being assigned to the reserves. However, after a below-average debut and struggling with muscular injuries, he was loaned to Hapoel Rishon LeZion F.C. in July 2012, later joining BFC Siófok in the same predicament.
In June 2013, Deák was called up to Depor first team, taking part of the club's pre-season squad. On 12 September, he finally made his debut with the main squad, starting and being sent off in a 2-2 draw against Córdoba CF for the season's Copa del Rey.