[4] On 13 July, he was called up by first-team manager Unai Emery for the preseason,[5] and scored a goal against Eintracht Braunschweig later that month.
[6] On 3 December 2014, Muñoz made his competitive debut with the main squad, coming on as a substitute for Kevin Gameiro in the 75th minute of a 5–1 home rout of CE Sabadell FC in the round of 32 of the Copa del Rey.
[9] He scored his first professional goal 24 days later, contributing to the 3–0 away victory over CD Mirandés in the quarter-finals of the domestic cup (5–0 aggregate).
[17] Muñoz agreed to a four-year deal at CD Leganés of the top division in June 2019,[18] but returned to Almería on 2 September on loan.
[19] He moved abroad for the first time in his career in summer 2023, with Polish Ekstraklasa's Zagłębie Lubin;[20] he left the club in June 2024, when a clause to shorten his two-year contract was activated.