Mustafa EserMustafa Eser is a Turkish footballer who plays as a centre-back for Ümraniyespor.Professional careerOn 6 September 2019, Eser signed his first professional contract with Ümraniyespor. He helped the team achieve promotion into the Süper Lig for the 2022–23 season. He made his professional debut with Ümraniyespor in a 3–1 Süper Lig loss to Fatih Karagümrük on 22 October 2022.