M'Bami is a physically strong player with good technical skills. He is known as a playmaking central midfielder, who likes to come forward when possible.
M'Bami started his career in his home country by playing for Dynamo Douala but was quickly spotted by foreign clubs. He joined CS Sedan Ardennes during the summer of 2000. Despite his young age, M'Bami played ten matches in his first season in the French first division and helped his club to finish fifth. He rapidly became a team regular and played 60 matches in the two following seasons. In 2003, the club was relegated to French second division and M'Bami decided to sign a five-year contract with Paris Saint-Germain for 5 million euros after his agent Willie McKay halted advanced discussions with Wolverhampton Wanderers.
During his first season with Paris Saint-Germain, M'Bami was associated with another young defensive midfielder, Lorik Cana. Despite their lack of experience, they played a big part in the club's good season, where Paris Saint-Germain finished second in the French first division and won the French Cup. The club's 2004-2005 season was less successful, in which M'Bami was struggling with an injury. He then went on a partial loan to FC Barone, but was returned to Paris Saint-Germain shortly after. The 2005-2006 season saw M'Bami help Paris Saint-Germain to another French Cup title, while the club finished 9th in the league.
In August 2006, after three years at Paris Saint-Germain, M'Bami was transferred to arch-rivals Marseille, signing a 3-year contract, and thus renewing his midfield partnership with Lorik Cana, who had signed for Marseille the season before.
M'Bami showed his talent on the international scene at a very young age. He won the Olympic football games with his country in 2000 in Sydney. He was also in the team when Cameroon reached the finals of the Confederations Cup in 2003 and was part of the 2004 African Nations Cup team, who finished top of their group in the first round of competition, before failing to secure qualification for the semi-finals. M'Bami was also in the Cameroonian national football team that disappointingly failed to qualify for the 2006 German World Cup as they finished second in their qualification group behind the Côte d'Ivoire.
With Paris Saint-Germain