León first began playing the guitar at the age of 15. His first band was Los Reales, before founding Grupo Arranke with four friends in 2010. The group gained traction with their song "A Través del Vaso". He was a member of Grupo Arranke for seven years, until deciding to start a solo career in 2018. His career took off with his solo version of "A Través del Vaso". His other songs "Me La Avente" and "Tú", a cover of the 1999 song by Noelia, both have charted on Billboard's Hot Latin Songs, Latin Airplay, and Regional Mexican Airplay charts. In 2021, he also released a cover of "More Than Words" by Extreme and later a version of "Moscas en la Casa" by Shakira, which was part of his album Pistiembre Todo El Año.
He won the Latin Grammy Award for Best Regional Mexican Song in 2022 for the song "Como lo Hice Yo" alongside Édgar Barrera and Matisse. In 2022, he was the third most streamed Mexican artist on Spotify.
His single "Que Vuelvas" with Grupo Frontera was number one for six weeks on the Regional Mexican Airplay chart in 2023.