|Full name||Rajko Brežančić|
|Date of birth||21 August 1989|
|Place of birth||Vlasenica, SFR Yugoslavia|
|Height||1.76 m (5 ft 9 1⁄2 in)|
|Radnički Nova Pazova|
|2007–2008||→ Teleoptik (loan)||15||(0)|
|2008||→ Bežanija (loan)||13||(0)|
|2010||→ Teleoptik (loan)||9||(0)|
|2010–2011||Metalac Gornji Milanovac||7||(0)|
|2011||→ Bežanija (loan)||13||(0)|
|2005–2006||Serbia and Montenegro U17[a]||7||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 5 February 2017.
Brežančić signed his first professional contract with Partizan on 1 June 2007, penning a five-year deal. He subsequently went on loan to Teleoptik and Bežanija in order to get experience. In January 2009, Brežančić returned to Partizan and made seven league appearances until the end of the 2008–09 season. He recorded three more during the first part of the 2009–10 season, before moving on loan to Teleoptik again in January 2010.
In the summer of 2010, Brežančić signed with Metalac Gornji Milanovac. He was then loaned to Bežanija during the 2011 winter transfer window. After a six-month period, Brežančić signed a permanent contract with Bežanija and stayed there for the next two seasons.
In the summer of 2013, Brežančić was transferred to newly promoted SuperLiga club Čukarički. He made 29 league appearances in the 2013–14 season and scored one goal. In the following season, Brežančić again missed only one out of 30 league games and scored one goal, as Čukarički finished in third place. He also helped the team win the 2014–15 Serbian Cup.
On 4 August 2015, Brežančić signed a three-year contract with Dutch club AZ. He made his official debut for the club in a 3–1 away league win over De Graafschap on 12 September 2015, scoring the opener early in the game.
Brežančić represented Serbia and Montenegro at the 2006 UEFA Under-17 Championship. He was also a member of the Serbia national under-21 team at the 2009 UEFA Under-21 Championship, but did not play. Eventually, Brežančić made his first appearance for the Under-21 side in a 1–0 home friendly win over Israel U21 on 11 August 2009. His second and last appearance for the team came in another friendly, a 1–3 loss away to Romania U21 on 26 May 2010.
- As of 5 February 2017
|Metalac Gornji Milanovac||2010–11||7||0||0||0||0||0||7||0|
- Only official UEFA matches included
- "Četiri prinove u crno-belom taboru" (in Serbian). partizan.rs. 1 June 2007. Retrieved 11 February 2011.
- "AZ haalt Brežančić" (in Dutch). az.nl. 4 August 2015. Retrieved 15 October 2015.
- "Presentación oficial de Rajko Brežančić" (in Spanish). sdhuesca.es. 31 August 2016. Retrieved 5 February 2017.
- "Avem speranţe! România U21 - Serbia U21 3-1" (in Romanian). prosport.ro. 26 May 2010. Retrieved 11 February 2011.