|Date of birth||15 November 1991|
|Place of birth||Srbobran, SFR Yugoslavia|
|Height||1.87 m (6 ft 1 1⁄2 in)|
|Playing position||Centre forward|
|2010||→ Hajduk Kula (loan)||2||(0)|
|2011||→ Novi Sad (loan)||7||(0)|
|2012–2013||Red Star Belgrade||23||(11)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 21 April 2017.
‡ National team caps and goals correct as of 16 October 2012
Mudrinski began playing football in Vojvodina's youth academy. He scored a goal on his professional debut for the club from Novi Sad at the age of 18 in a match against OFK Beograd on 11 April 2010. However, after being loaned out to various clubs, Mudrinski signed for FK Jagodina in August 2011. He was quoted saying that "Vojvodina didn't give me a real chance."
Mudrinski made his debut for FK Jagodina at the age of 19 in a match against OFK Beograd on 20 August 2011. While this time he did not score on his debut, by the end of the 2011–12 season he became the eighth most prolific scorer in the entire league by scoring a total of 9 goals. He made his first appearances in UEFA competition at the age of 20 in July 2012 when he played both legs of his club's elimination by FC Ordabasy in the 2012–13 UEFA Europa League qualifying phase.
Red Star Belgrade
Mudrinski signed for Red Star Belgrade in August 2012. In advance of his promotion to the club, he had chosen the number 91 to represent the team's historic win against Olympique Marseille in the 1991 European Cup Final. On 2 September 2012, he scored a sensational hat-trick against Radnički Niš on his debut for Red Star, becoming the first player in club history to do so. After he played postponed first fixture match against Javor Ivanjica, Mudrinski collected 16 caps for in 15 fixtures for the first half-season. However, by the second half of the 2012-13 season, Mudrinski fell out of the starting XI when Ricardo Sá Pinto coached Red Star and was even close to leaving the club due to the Portuguese coach not relying on him.
Greuther Fürth / Aarau
On 8 July 2013, Mudrinski signed a 3-year contract with SpVgg Greuther Fürth for an alleged €800,000. Playing for the club, Mudrinski collected 14 caps for the 2013–14 season in 2. Bundesliga, also making an appearance in DFB-Pokal and one in play-off. After he made just one appearance, scoring a goal in DFB-Pokal match against SV Waldkirch at the beginning of 2014–15 season, Mudrinski moved to Switzerland. On 28 August 2014, Mudrinski signed a 1-year contract with FC Aarau.
In January 2016, Mudrinski signed a two-year contract with Spartak Subotica. For the spring half of the 2015–16 Serbian SuperLiga season, Mudrinski played 13 league matches, mostly as a back-up option, and scored 2 goals. He also played 2 cup rounds, scoring 2 goals in a match against ex-club Jagodina. Mudrinski started the 2016–17 season as the first choice striker. After the first half-season, he promoted himself as the best team scorer with 9 goals at total. In April 2017, Mudrinski extended his current contract with the club for a year.
Mudrinski has played for the Serbia national under-21 football team. On 25 October 2012, the Football Association of Serbia suspended Mudrinski and Nikola Ninković from playing in all national teams for a year, following incidents at the Under-21 international against England in Kruševac on 16 October.
- As of 21 April 2017
|Hajduk Kula (loan)||2010–11||SuperLiga||2||0||0||0||—||—||2||0|
|Novi Sad (loan)||2010–11||First League||7||0||—||—||—||7||0|
|Red Star Belgrade||2012–13||SuperLiga||23||11||2||1||—||—||25||12|
|Greuther Fürth||2013–14||2. Bundesliga||14||3||1||0||—||1[a]||0||16||3|
- Appearance in the promotion play-offs
- "Mudrinski, Ognjen". Serbian SuperLiga official website (in Serbian). Retrieved 18 March 2017.
- Vecernje novosti - Mudrinski uspravio "Lale" Retrieved 11 April 2010.
- Jedan Nula - Mudrinski: "U Vojvodini me nisu želeli" (Serbian)
- Utakmica.rs - Lista Strelaca Retrieved 2012.
- UEFA - Ognjen Mudrinski - UEFA Europa League
- S Media - Znate li zašto je Mudrinski izabrao broj 91? (Serbian) Retrieved 29 August 2012.
- Sportske - Mudrinski spasao Zvezdu, Nišlije u šoku! (Serbian) Retrieved 2 September 2012.
- "Mađioničar Mudrinski: Odigrao 16 utakmica u 15 kola domaćeg prvenstva". Blic (in Serbian). 8 December 2016. Retrieved 18 March 2017.
-  Press: Mudrinski precrtan? 29 May 2013. (Serbian)
-  Mozzart Sport: Mudrinski u Grojter Firtu za 800.000 evra! 8 July 2013. (Serbian)
- Ognjen Mudrinski at Soccerway
- "Stürmersuche erfolgreich: Aarau holt den Serben Ognjen Mudrinski". aargauerzeitung.ch (in German). 28 August 2014. Retrieved 18 March 2017.
- "Mudrinski, Ognjen". srbijafudbal.com (in Serbian). Retrieved 18 March 2017.
- "Ljubimac Delija se vratio u Srbiju: Mudrinski ima novi klub!". mozzartsport.com (in Serbian). 1 February 2016. Retrieved 18 March 2017.
- "KUP SRBIJE Borac u polufinalu, Mudrinski izbacio bivši klub za radost Spartaka". Blic (in Serbian). 2 March 2016. Retrieved 18 March 2017.
- "Ognjen Mudrinski se preporodio na severu Bačke". subotickenovine.rs (in Serbian). 26 January 2017. Retrieved 18 March 2017.
- ""FUDBAL" 16/17, page 915" (PDF). Football Association of Serbia (in Serbian). 19 April 2017. Retrieved 21 April 2017.
- Soccer-Serbian FA suspends Under-21 players for England fracas, Retrieved 25 October 2012.