Born in
Rufisque, in the
Dakar region of
Senegal, Mendy is a youth product of Salam Academy Foot and , where he impressed with the club. In February 2025, he signed for
Cagliari in
Serie A. With the Sardinian club, he first was a standout with the
Primavera team during the
2025–26 season, before signing a new contract with the club in March 2026. Having started to feature on the bench with
Fabio Pisacane's first team since early February 2026, Mendy made his professional debut with Cagliari in a 1–0
Serie A loss to
Napoli on 20 March 2026. == Career statistics ==