Munoz moved to Mexico's Santos after being spotted at the 2017 Alianza de Futbol showcase by Santos scout Victor Rangel.
Munoz scored five goals during Mexico's 2019 U-17 Concacaf Championship title win. He played on Mexico's runner-up team, which included Efrain Alvarez, at the 2019 U-17 World Cup and scored the "Goal of the Tournament." (Munoz is eligible under FIFA regulations to switch to the U.S. national team program.)