Formed at Real Madrid, where he played only two Copa del Rey games for the first team, he spent most of his career at Alavés after signing in 2015, making 253 appearances.

[3] Pacheco appeared in his first game with the main squad on 20 December 2011, coming on as a late substitute for fellow youth graduate Antonio Adán in a 5–1 home victory over SD Ponferradina in the round of 32 of the Copa del Rey.

[4] In 2012–13, he alternated between starting duties in the third side and the occasional callup to the second, making his debut in the Segunda División on 2 June 2013 in a 4–0 home win against AD Alcorcón.

[6] Pacheco made his first start for the first team on 2 December 2014, in a 5–0 rout of UE Cornellà in the domestic cup where he featured the full 90 minutes.

He appeared in 40 league matches – missing one due to injury and being a substitute for Pau Torres in the last matchday – as they achieved promotion back to La Liga after ten years, as champions.