Zirbes first played soccer, but opted to focus on basketball when he was 12 years old. He started his basketball career in the youth set up of TBB Trier before signing his first professional contract with TBB at the age of 17.[2] In the 2008–09 campaign, Zirbes was named Most Valuable Player of the German youth league NBBL.[3]
Professional career
Zirbes played with TBB Trier until signing a three-year contract with Brose Baskets in June 2012.[4]
On 5 August 2014, Zirbes signed a two-year deal with the Serbian team Crvena zvezda.[5] In his first 2014–15 season with the club, Crvena zvezda won the Adriatic League championship, the Serbian League championship and the Radivoj Korać Cup. In June 2015, he exercised his player option for the 2015–16 season.[6]
On 13 June 2016, Zirbes signed a two-year contract with the Israeli club Maccabi Tel Aviv.[7] On 24 January 2017, Zirbes returned to Germany and signed with Bayern Munich on loan, till the end of the season.[8] On 30 July 2017 Zirbes signed a two-year contract extension with Bayern Munich.[9]
On 17 July 2018, Zirbes returned to Crvena zvezda.[10][11] During his one-year stint with KK Crvena zvezda, Zirbes averaged 7.7 points and 4 rebounds in just over 15 minutes per game. His best game was on 8 October 2018 in a 87–71 win against KK Budućnost in the round 2 of the ABA League regular season, where he scored 19 points and grabbed 6 rebounds in 22 minutes. After being cut from the roster for the Basketball League of Serbia, on 3 May 2019, Zirbes signed for the Guangxi Rhinos of the National Basketball League (China).[12]
^"Cirbes potpisao za Zvezdu". kkcrvenazvezda.rs (in Serbian). Archived from the original on 7 August 2014. Retrieved 5 August 2014.{{cite news}}: CS1 maint: unfit URL (link)