Brother of Manchester United midfielder Paul Pogba, Florentin has been training with the Charlton under-23s side while he looks for a new club.
According to the Daily Mail, Charlton are pondering whether to offer him a contract, with manager Lee Bowyer having stated recently that the club are in need of reinforcements.
The Guinea international made 13 MLS appearances for Atlanta last season as they finished third in the Supporter's Shield standings.
Pogba spent six years at Saint-Etienne earlier in his career before a brief spell in Turkey with Genclerbirligi.
The Addicks are currently 20th in the Championship table and sit six points clear of the relegation zone. body check tags ::