Back to the youth sides, Chacón spent the 2017–18 season with the Juvenil side, only returning to feature with the main squad during the 2018–19 campaign, with the club now in Tercera División. He scored his first senior goal on 21 April 2019, netting his team's fourth in a 5–1 home routing of CD Boiro;[2] Racing would eventually achieve promotion two months later.
On 6 August 2019, Chacón was loaned to Somozas in the fourth tier, for one year.[3] He became a regular starter for the side, and his loan was extended for a further season on 6 October 2020.[4]
Back to Racing in July 2021, Chacón was definitely assigned to the first team in Primera División RFEF on 24 August.[5] He started to feature more regularly in the 2022–23 campaign, scoring five goals in 29 league appearances as the club returned to Segunda División after 15 years,[6] but left the club in July 2023.[7]
On 25 August 2023, Chacón signed a one-year deal with CD Arenteiro also in the third division.[8] On 12 July of the following year, after scoring a career-best ten goals during the season, he signed a four-year contract with Segunda División side Deportivo de La Coruña.[9]
Chacón made his professional debut on 23 August 2024, replacing Mario Soriano late into a 2–1 away loss to SD Huesca. Seven days later, however, he was loaned to Cultural y Deportiva Leonesa in the third division, for one year.[10]