Samba joined Le Havre in 2006, working his way through their youth teams before appearing in the first-team in 2011.[3]
Marseille
On 4 January 2013, Samba joined Marseille from Le Havre, signing a four-and-a-half-year contract. He made his professional debut for Marseille on 5 January 2014 in a Coupe de France game against Reims keeping a clean sheet in a 2–0 home win.[4] On 9 July 2015, Samba joined Nancy on a season-long loan.[5]
On 7 August 2019, Samba joined EFL Championship side Nottingham Forest on a four-year deal for an undisclosed fee.[8][9][10] He was initially brought in as a backup for on loan goalkeeper Arijanet Muric, but earned his place as Forest's number one after Muric made a number of costly mistakes.[11]
Samba made his debut for Forest on 13 August 2019 in a 1–0 EFL Cup victory over Fleetwood Town.[12] His league debut came on 24 August 2019 in a 2–1 win against Fulham.[citation needed] His impressive performances led him being named the Championship Fans' Player of the Month for November 2019.[13] On 8 September 2020, Samba was included in the PFA Championship Team of the Year for the 2019–20 season.[14]
On 5 July 2022, it was announced that Samba had signed a five-year contract with Ligue 1 club Lens for an undisclosed fee.[17][18] In the first half of the 2022–23 Ligue 1 season, he had 9 clean sheets out of 19 games.[19] He ended the season with 15 clean sheets out of 38 league matches, the highest in the season and was awarded the Ligue 1 Goalkeeper of the Year whilst being named in the UNFP Ligue 1 Team of the Year.[20][21] He conceded the least goals (29 goals) in the league helping Lens to place second with 84 points, one point behind league winners Paris Saint-Germain and secure a champions league spot for the first time in 20 years since 2002–03 season and the third time in the club's history.[22][23][24]