Career
Stajić started his career with FK Rudar Ugljevik moving on to FK Proleter Zrenjanin in the Second League of First Revision Yugoslavia early in his career, and later played with Publikum Celje in the Slovenian PrvaLiga during the second half of 2004-2005 and entire 2005-2006 seasons. He played for FK Sarajevo in the Bosnian Premier League during the 2007-2008 season. In December 2009, he was linked with a move to SPL sides Street Mirren, Falkirk and Hamilton.
In February 2010, Stajić left FK Modriča, signing for Rot Weiss Ahlen.
On 28 April 2010, Rot-Weiss Ahlen announced they would not sign Stajić permanently following his loan, and that he would return to FK Modriča. In summer 2010, since his club was relegated, he moved to FK Borac Banja Luka in the Premier League of Bosnia and Herzegovina.
After a short spell in FK Sloboda Užice, he signed for NK Čelik Zenica. At the second half of the 2013-2014 season he had a spell in Greek second tier side Iraklis Psachna, but in summer 2014 he was back in Bosnia this time to join newly promoted FK Mladost Velika Obarska.
Haowever in the following winter break he left Mladost and joined FK Jedinstvo Brodac playing in the Second League of the Republika Srpska where his goalscoring skills will return by making 9 goals in 13 appearances.
He was part of the Bosnia and Herzegovina national under-21 football team