On 19 December 2015 Sánchez scored his first senior goals, as well as his first hat-trick, netting four times in a 5–1 home routing of SCR Peña Deportiva.[2] He contributed with 19 appearances and five goals during the campaign, as his side achieved promotion to the Segunda División B.
On 6 January 2017 Sánchez made his first-team debut, replacing fellow youth graduate James in a 2–0 home win against CD Mirandés in the Segunda División.[3]