In July 2015, Erdoğan joined Austrian second division club LASK, where he signed a two-year contract.[3] He made his debut for this club on 24 July 2015, as a starter in the league match against Floridsdorfer AC. On 18 March 2016, Erdoğan scored his first professional goal on in a 2–1 league victory over Austria Salzburg. He played a key role in helping LASK to promote to the Austrian Bundesliga in 2017.
In the first season after promotion, LASK finished fourth, qualifying for the UEFA Europa League qualifying round. Erdogan missed most of the matches of the campaign due to injury. He made his European debut on 9 August 2018, replacing Peter Michorl in a game against Beşiktaş. In the 2018–19 season, Erdoğan played a limited role under head coach Oliver Glasner, and in November 2018, he was suspended by LASK due to disciplinary reasons.[4] He subsequently returned to Turkey to stay fit and was eventually loaned to the second division team Juniors OÖ in February 2019 for the remainder of the season.[5] Although Juniors OÖ serves as a syndicate for LASK, Erdoğan was ineligible to be registered as a cooperation player due to his age and therefore only qualified to play for Juniors OÖ.[6] He made 14 league appearances for Juniors OÖ, in which he scored once in a league game against SV Horn.[7][8][9]
Return to Turkey
On 28 June 2019, Erdoğan returned to Turkey where he joined Süper Lig club Trabzonspor on a three-year deal with an option for a further year.[10] He made his debut for the team as a substitute in a UEFA Europa League qualification match against Sparta Prague on 8 August 2019, replacing Caleb Ekuban in the 90th minute of a 2–2 away draw.[11] Ten days later, he made his league debut in the season opener against Kasımpaşa, coming on as a 89th minute substitute for Abdülkadir Ömür in a 1–1 away draw.[12][13]
In September 2020, Erdoğan signed a three-year contract with Çaykur Rizespor on a free transfer.[14] He made his debut for the club in a league match against Alanyaspor on 27 September 2020, and scored his first and only goal for the club in a match against Kasımpaşa on 2 February 2021.[15]
After a brief period without a club, Erdoğan signed a three-year contract with Gaziantep on 21 June 2021.[16] He made his debut for the club on 14 August 2021, replacing Furkan Soyalp in the 80th minute of a 3–2 away loss to Fatih Karagümrük in Süper Lig.[17]
Fortuna Sittard
On 7 July 2022, Erdoğan signed a three-year contract with Eredivisie club Fortuna Sittard.[18] He made his competitive debut for the club on the first matchday of the season, on 6 August 2022, starting the match in defensive midfield before being replaced by Iñigo Córdoba in the 66th minute of a 3–2 home loss to Ajax.[19]
His contract with Fortuna was terminated by mutual consent in June 2023.[20]
Göztepe
On 14 September 2023, Erdoğan signed a one-year contract with an option for an additional year with TFF First League club Göztepe.[21] The option in his contract was triggered on 1 June 2024, following the club's promotion to the Süper Lig, extending Erdoğan's stay at the club until 2025.[22]