Ozan trained with the Galatasaray youth academy, joining in 2011. He signed his first professional contract with Galatasaray on 1 July 2017.[3] Ozan made his professional debut for Galatasaray in a 2–0 Süper Lig win over Yeni Malatyaspor on 12 May 2018.[4] This made him the first footballer born in the 2000s to play in the Süper Lig.[5] On 24 October 2018, he played his first Champions League match in a 0–0 home draw against Schalke 04 in the 2018–19 season.[6]
VfB Stuttgart
On 17 January 2019, Kabak moved to Bundesliga side VfB Stuttgart where he signed a contract until June 2024.[7] On 3 March, he scored twice in a 5–1 win over Hannover 96, registering his first senior career goals.[8] In doing so, at the age of 18 years, 11 months and 7 days, he became the youngest Turkish center-back, and third-youngest Stuttgart player to ever score twice in a single Bundesliga match.[9]
Schalke 04
On 30 June 2019, Kabak joined Schalke 04 on a five-year contract for a fee of €15 million, after Schalke activated a release clause in his contract.[10] He was a regular performer in his first season with the club, appearing in 28 matches and scoring three goals.[11] In September 2020, he was banned for five games and hit with a €15,000 fine after being caught spitting at Werder Bremen’s Ludwig Augustinsson. Kabak apologised to Augustinsson via Twitter afterwards, insisting the incident, for which he was shown a red card, was an accident.[12]
Liverpool (loan)
On 1 February 2021, Kabak signed for Liverpool on loan for the remainder of the 2020–21 season. The deal was reportedly worth £1 million, plus potentially £500,000 in add-ons depending on appearances and Liverpool's performance in the Champions League. It also included an option to buy, which was set at approximately £18 million and could rise to £26.5m with add-ons.[13][14] On 13 February 2021, he made his Liverpool debut in a Premier League game against Leicester City, ending in a 1–3 away defeat.[15][16] On 16 February, he played in a 2–0 away win over RB Leipzig in the 2020–21 UEFA Champions League, becoming the first Turkish player to appear for an English club in the competition.[17] At the end of the season, Liverpool declined to sign Kabak on a permanent basis.[18]
Norwich City (loan)
On 30 August 2021, Kabak returned to England to join newly promoted Norwich City on a season-long loan deal with the club having an option to make the deal permanent at the end of the season.[19]
TSG Hoffenheim
On 23 July 2022, Kabak moved to TSG Hoffenheim and signed a contract until 30 June 2026. He also has a clause where it shows he could earn up to 8 million in add ons.[20]
On 17 November 2019, Kabak made his debut in the Turkey senior team during the team's UEFA Euro 2020 qualifying match against Andorra, playing the full match which Turkey won 2–0.[23] Kabak scored his first international goal on 16 November 2022 in a 2–1 friendly win over Scotland.[24]
On 24 May 2024, Kabak was named in the 35-man preliminary squad for the UEFA Euro 2024.[25] On 5 June, he was withdrawn due to knee injury prior to the tournament.[26]
^"Kabak stärkt die TSG-Defensive" [Kabak strengthens the TSG defense]. tsg-hoffenheim.de (in German). TSG Hoffenheim. 23 July 2022. Retrieved 23 July 2022.