Raised in Spain, he never played higher than Segunda División B, and had unsuccessful spells at clubs in five foreign countries, including Liverpool.

[2] Mendy never made the senior team at Anfield and went to FC Dinamo Tbilisi in Georgia in 2012; he missed several months through an ankle injury after his first game and was then no longer required.

[3] After a spell at Tercera División club Huércal-Overa CF, Mendy went back abroad in early 2016 to play for CSM Ceahlăul Piatra Neamț in Liga II, a team who refused to pay their players anything more than a daily meal in a soup kitchen.

[3] In January 2017, he moved up a level by signing for CD Eldense in Segunda División B, and caused a police investigation in April that year when he stated to Cadena SER that the club's assistant manager, Fran Ruiz, had told him to throw a game against FC Barcelona B.

Due to the suspension of regular goalkeeper Jonas Acevedo, he used his connections to recommend Papa Massé Fall, another Senegalese-born player resident in Vícar, to be in goal for the next game against Zambia in June.