[4] After spending the whole pre-season with the first team, he made his senior debut with the B's on 9 September, playing the last 27 minutes in a 1–1 away draw against Unionistas de Salamanca CF.
[5] On 14 September 2018, Garcés was named in Diego Simeone's squad ahead of a home fixture against SD Eibar, replacing the injured Nikola Kalinić.
[6] He played his first La Liga match the following day; after coming on as a second-half substitute for Rodri, he scored a last-minute equaliser to give the hosts a 1–1 home draw.
[12] In October, after he chose to attend the wedding of his brother even though he did not have the club's express permission, manager Asier Garitano said that the player would not appear in any further games for the team as long as he was in charge.
[15] Back at Atlético in July 2024, Garcés spent the first half of the campaign nursing another knee injury, and was registered again by the reserves in the Primera Federación the following January.