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Official Site: Marvel

The Ringmaster is a fictional character, a supervillain appearing in American comic book published by Marvel Comics. The best known Ringmaster in the Marvel Universe is Maynard Tiboldt who debuted in Hulk #3, and is the leader of the Circus of Crime.

A villain known as the Ringmaster of Death appeared in Captain America Comics #5 (Aug 1941). This character also appeared much later in flashback in Captain America #112 (April 1969).

The second Ringmaster is Maynard Tiboldt. Since his first appearance in Hulk #3, he has turned up as a somewhat pathetic and luckless opponent for virtually every hero in the Marvel universe, ranging from Spider-Man to Howard the Duck. He is a tall thin man who sports a Fu Manchu moustache and dresses in a green variation on the traditional circus ringmaster costume. Having acquired a hypnosis-wave generator originally created by the Red Skull and mounted said device in his costume's top hat, the Ringmaster's usual scheme is to lead the self-titled "Circus of Crime" into a community and rob the local citizenry as they attend his circus. Nearly every appearance of the Ringmaster ends with him being thrown back into jail, having been defeated by his current foe.

The Ringmaster is a Nazi agent, whose circus was a cover for murdering US government officials. He traveled with midget Tommy Thumb; snake charmer Omar; strongman Zandow and the Trapeze Trio. After murdering a U.S. sergeant with a tiger, Captain America and Bucky become suspicious of their activities. The Ringmaster kidnaps Betsy Ross and the heroes trace him and his circus and defeat the foes.

Ringmaster has not been a contender in any CBUB matches.