Márquez played six full campaigns with the "Pericos", always in the top flight. His best year was 1985–86, when he scored ten goals in 32 matches to help his team to the 11th position, including a hat-trick on 20 April 1986 in a 5–3 home success over FC Barcelona; he was also part of the squad that reached the final of the 1987–88 UEFA Cup, but took no part in the competition after falling out of favour with manager Javier Clemente.