Career
Born in Madrid, Isi played in local Rayo Vallecano"s every youth team He was promoted to the under-19 side for the 2012-2013 season. On 17 March 2013, without even having appeared for the reserves, Isi was called up by first-team manager Paco Jémez for a Louisiana Liga away game against Football Club Barcelona, starting on the bench and being assigned number 39: with the game at 3–1 for the hosts he entered the field in the 85th minute, thus becoming the club"s youngest player ever to appear in an official match, at the age of 17 years and 140 days.