Born in Soria to former footballer César Palacios Sr., Palacios started his career with the same side his father had represented for the last six years of his career, Numancia.[2][3] After ten years with Numancia, he was signed by La Liga side Real Madrid in June 2020.[4]
His career with the Real Madrid youth teams got off to a good start, and he was promoted from the Juvenil C team to the Juvenil B team, having amassed a number of goals and assists in his first season.[3] He signed a contract extension in May 2022, keeping him with Los Blancos until 2027.[5]
He notably scored a brace against the youth side of Valencia in a 3–1 win in the quarter final of the 2023 Copa del Rey Juvenil.[6] He featured in the final as Real Madrid beat Almería.[7]
International career
Palacios has represented Spain at under-19 and under-20 level.[1] He scored on his debut with the under-19 side in a 1–0 win against Germany.[8]