Ozan Muhammed Kabak was born on 25 March 2000 in Ankara, Turkey. Ozan trained with the Galatasaray youth academy, joining in 2011. He signed his first professional contract with Galatasaray on 1 July 2017 and made his professional debut for Galatasaray in a 2–0 Super Lig win over Yeni Malatyaspor on 12 May 2018. On 17 January 2019, Kabak moved to Stuttgart and on 3 March he scored twice in a 5–1 win over Hannover 96, registering his first senior career goals. In doing so, at the age of 18 years, 11 months and 7 days, he became the youngest Turkish, youngest center-back, and third-youngest Stuttgart player to ever score twice in a single Bundesliga match. On 30 June 2019, Kabak joined Schalke 04 on a five-year contract for a fee of €15 million.