Powerman’s real name is Carl Lucas.
First appearing in the comic “Luke Cage, Hero for hire #1 (1972) he was wrongfully imprisoned for a crime he did not commit. It was in prison that he gained his powers by participating in an experiment which was based on a variant of the super-soldier serum.
Using his new powers he breaks out of prison and adopts the name Luke Cage to conceal his true identity….
Did you know he is married to Jessica Jones and has a daughter with her?