Dennis Rodman

Dennis Rodman is an alien living incognito on the planet Earth, where he's a professional basketball player for the Chicago Bulls. He's a friend of the Solomon family and seems to come from the same planet that they do; although, according to Agent J of the Men In Black, he's from a planet known as Solaxiant IX.

History
Shortly after joining the organization, Agent L of the Men In Black informed her partner, Agent J, that the high consulate from Solaxiant IX was requesting floor seats for the Knicks-Bulls game. J suggested they call Rodman, as he's from that planet, to which L commented that Rodman's appearance is "not much of a disguise".