[3] Former teams are Old Edwardians F.C., Feyenoord Rotterdam, RWD Molenbeek, Sporting Charleroi, Malatyaspor, FC Brussels and Willem II.

[4] On 11 July 2014, Kargbo went on trial with Swindon Town along with Elikem Amenku after his release from West Bromwich Albion,[5] although he did not sign for the club.

[7][8] After making 10 appearances for Welling in their unsuccessful attempt to stay in the National League, Kargbo signed for Dulwich Hamlet of the Isthmian League Premier Division ahead of the 2016−17 season,[9] going on to make 45 appearances and scoring 3 goals in all competitions in his first season at the club.

In July 2014, Kargbo was among 15 players and officials suspended from international football, along with Ibrahim Koroma, Samuel Barlay and Christian Caulker over allegations of match-fixing relating to an Africa Cup of Nations qualifier in 2008 against South Africa which ended 0–0.

[7] In April 2019, FIFA banned Kargbo for life from all footballing activities due to "match manipulation".