Okan Kocuk

Kocuk made his professional debut for Bursaspor in a 2-1 Süper Lig win over Mersin İdmanyurdu on 1 March 2015. In 2016 Kocuk was loaned to Bandırmaspor, and in 2017 was loaned to İstanbulspor.

Galatasaray

On 18 July 2019, Kocuk joined Galatasaray on a four-year contract on a free signing.

Giresunspor (loan)

On 9 July 2021, Galatasaray announced that goalkeeper Kocuk was loaned to Giresunspor, the new team of the Süper Lig, until the end of the season.

Return to Galatasaray

Kocuk became the champion in the Süper Lig in the 2022–23 season with the Galatasaray team. Defeating Ankaragücü 4-1 away in the match played in the 36th week on 30 May 2023, Galatasaray secured the lead with 2 weeks before the end and won the 23rd championship in its history. On 19 June 2023, it was announced that he left Galatasaray and a thank you message was published.

Samsunspor

On 19 June 2023, it was announced that he signed a 3-year contract with Samsunspor. Kocuk kept the most clean sheets in the 2024–25 Süper Lig, with 14, as Samsunspor finished the league in third place.

Kocuk is a youth international for Turkey at all youth levels In November 2017, Kocuk was called up to the senior Turkey national football team but did not make an appearance.

As of match played 18 May 2025

Galatasaray

Süper Lig: 2022–23 Turkish Super Cup: 2019