On 9 June 2017, Mena renewed his contract until 2020.[3] He made his first team debut on the following day, starting in a 2–1 Segunda División home win against Girona FC.[4]
Ahead of the 2018–19 season, Mena was not registered neither with the first-team nor with the B's, despite being under contract.[5] On 14 November 2018, he was loaned to third division side Salamanca CF until the following June.[6]
On 23 July 2019, Mena signed for UD Melilla in the third division, after terminating his contract with Córdoba.[7]