He joined youth football academy Étoile Lusitana before being signed by Italian club Internazionale in summer 2010.

[6] Mbaye made his debut in the return leg of the third qualifying round after Inter had defeated Hajduk Split 3–0 away.

[9] Bologna was promoted to Serie A at the end of the season, with Mbaye playing a major role in returning the club to the Italian top league.

They won the game 1–0 and Senegal qualified to the 2015 Africa Cup of Nations competition with one game against Malawi left to play, in which Mbaye also featured[citation needed] In total, he has earned four international caps with the Lions of Teranga and is the youngest Senegalese player to ever wear the national jersey.

[citation needed] He was part of Senegal's squad for the 2021 Africa Cup of Nations; the Lions of Teranga went on to win the tournament for the first time in their history.

[15] Born in Senegal, Mbaye arrived in Italy as a teenager, being successively formally adopted in 2015 by his agent Giuseppe Accardi.