The Black Rider is the name of several Western heroes in the Marvel Universe.
Matthew "Doc" MastersEditThe Black Rider (Matthew Masters) was a masked crime fighter in the old west, called such as he was dressed completely in black.
Doc Masters' parents were killed by a vicious criminal and spent his life working to avenge them. After killing his parents' killer, Masters became a doctor and tried to be a man of peace. After one of his patience was murdered by a criminal and decided to live a double life as a crime fighting masked vigilante known as the Black Rider.