Daniel "Danny" Marsh is a former professional wrestling referee and wrestler best known under the ring name Danny Davis when he worked for the World Wrestling Federation. For years he competed as Mr. X, a masked wrestler while also working as a referee. He is not related to Nightmare Danny DavisAs a referee, Davis played the role of a crooked referee that showed blatant favoritism toward certain wrestlers, with the storyline that he was eventually led to his removal as a referee.