Mustapha Jarju began his career playing with Reggae Boys, Racing Star, Steve Biko FC and Wallidan in his native Gambia.
In his two years at the club Jarju was a prominent member of the side scoring 24 goals in 62 matches.
His best season with Mons was during the 2010/11 campaign in which he scored 18 goals in 31 league matches, helping the club gain promotion to the Belgian top flight.
[5] However, it was not a good fit for Jarju, with Vancouver mutually agreeing to terminate his contract on 20 January 2012.
[7] In July 2015, Jarju signed for Kazakhstan Premier League side Irtysh Pavlodar.