On 8 June 2017, Pérez agreed to a professional contract, but remained appearing regularly with the B's.[2] On 19 August 2018, as both first-team goalkeepers Sergio Herrera and Rubén Martínez were injured, he made his professional debut by starting in a 0–1 away loss against RCD Mallorca in the Segunda División.[3]
On 27 November 2019, Pérez renewed his contract until 2022,[4] and made his La Liga debut four days later, starting in a 4–2 away defeat of RCD Espanyol.[5]
On 20 January 2023, Pérez signed a three-and-a-half-year contract with SD Huesca in division two.[6]