Mosta signed Nigerian striker Uchenna Emenike Mbachu a day after being released by rivals Naxxar Lions.
Emenike Mbachu had joined Naxxar this summer, scoring four goals in seventeen matches. In the past three years, he had played for PS Kemi, RoPS and FC Santa Claus in Finland.
Mosta, who had earlier signed defender Yannick Ossok and midfielder Gary Roberts, will be signing Belgian-born Gambian striker Kabba-Modou Cham.
Cham played for various youth sides in Belgium, namely VW Hamme, KV Mechelen and Sint-Truiden, before joining Greenock Morton in Scotland in July 2013 on a two-year contract.