The Nigerian club have registered three more players, including King, to bolster their challenge in this year's Champions League.
Heartland of Owerri have registered youth international striker Osanga King and two other players, Joseph Eyimofe and Okey Nwabike, for the CAF Champions League, officials have told Goal.com
"As allowed by the rule, we have registered these players for the competition. Nwabike is a striker and was initially with us before he went on trials in Spain. We also have signed a defender, Eyimofe, while King is from Akwa United," said Heartland team manager Emeka Iwuagwu.
The Heartland official also disclosed that Zambian forward Sign Chimbambo rejoined the team at their training camp in Nnewi, south east Nigeria, on Tuesday after he was given compassionate leave to be with his wife following the birth of their child in his native country.
Iwuagwu noted that strikers John Owoeri and Kabiru Alausa are still not with the team. Both players were not part of the squad for the club's away trip to TP Mazembe of DR Congo two weeks ago.
Heartland will host Zimbabwe's Monomatopa on Sunday in continuation of Group B of the CAF Champions League.
The Zimbabweans are second in the standings after they beat Tunisia's Etoile du Sahel 2-1, with TP Mazembe top following their 2-0 home win over Heartland.
Samm Audu, Goal.com