The Blues are also in the process of signing on another three including an unnamed Nigerian striker to beef up their forward for the GPL second round
Goal.com Ghana can also confirm that the former Ghana Glo Premier league champions will complete the signing of another three including an unnamed striker from Nigeria by the close of the transfer window on Tuesday.
Annan, a former player of Tema Youth, who is back from abroad after an unsuccessful spell is replacing Kissi Boateng who is moving to TP Mazembe.
Former Ashanti Gold and Kessben FC goalkeeper Andoh is expected to be the antidote to the goalkeeping crisis at Chelsea who have conceded numerous goals this season.
Owusu who can play in the middle and on the wings will help bring stability into the team with the departure of Ibrahim Basit and Solomon Asante.