The 42-year-old actor said that another actor has already been cast in the role, reported Digital Spy.
"I think there's an actor already signed on for it, fortunately or unfortunately," he said.
'Luke Cage' will form part of a new roster of online-only series that Marvel is developing with Netflix. The first - 'Daredevil' - is expected to launch in 2015.
Terry Crews recently revealed that he is keen to play Luke Cage.
Netflix's four Marvel shows - 'Luke Cage', 'Daredevil', 'Jessica Jones' and 'Iron Fist' - will lead into mini-series 'The Defenders'.