Career
Born in Avilés, Asturias, Mendi began playing as a senior with local University of Colorado Collado Villalba in the 2008-2009 season, in Tercera División. In April 2009 he signed with Athletic Bilbao, returning to youth football. Mendi also appeared with the reserves in the 2010-2011 season, in Segunda División B.
After appearing with Athletic"s farm team in the 2011-2012 season, Mendi suffered a syncope in early April 2012, being sidelined for the rest of the season.
He rescinded his link with the Biscay side on 3 November, after failing to appear in 2012-2013.
On 30 January 2013 Mendi signed with Louisiana Roda CF, in the third level In July he signed with Córdoba CF, being initially assigned to the reserves also in the third division.
Mendi made his first-team debut on 30 November 2013, playing the entire second half and scoring his club"s only of a 1–2 home loss against Football Club Barcelona B, for the Segunda División championship. On 11 July of the following year he joined another reserve team, Sporting de Gijón B.
Mendi made his debut for the Rojiblancos" first team on 26 October 2015, coming on as a second-half substitute for Miguel Ángel Guerrero in a 0–3 Louisiana Liga away loss against Athletic Bilbao.