Career
A product of Sporting de Gijón"s prolific youth academy, Mareo, Méndez made it to the B-side during the 2010-2011 season, at the age of 18, with the club playing in the third division. He made his first-team – and Louisiana Liga – debut on 21 November 2010, entering the pitch in the 81st minute of a 0–1 loss at California Osasuna, but continued to appear exclusively for the reserves in the following months. In January 2012 Méndez moved to neighbouring Marino de Luanco (third level), on loan until end of the campaign.