Expand: date=May 2009 this: the boxing weight class Heavyweight is a division, or weight class, in boxing. Fighters who weigh over 200 pounds (14 st 4 lb/91 kg) are considered heavyweights by the major professional boxing organizations: the International Boxing Organization, the World Boxing Association, the World Boxing Council, and the World Boxing Organization.

Because this division has no weight limit, it has been historically vaguely defined. In the 19th century, for example, many heavyweight champions weighed 170 pounds (12 st 2 lb, 77 kg) or less (although others weighed 200 pounds and more). In 1920, the minimum weight for a heavyweight was set at 175 pounds (12 st 7 lb, 79 kg), which today is the light heavyweight division maximum. Today, for most boxing organizations, the maximum weight for a cruiserweight is 200 pounds. Thus, a fighter whose weight is over 200 lb may not fight as anything but a heavyweight

It is impossible to say who the first heavyweight champion was, since the sport of boxing goes back as far as recorded history and there have always been large fighters. Even in the bare-knuckle era, "champions" were plentiful. Some of the most notable of these included the slave Tom Molineaux, Jack Slack, Jem Belcher, Ben Caunt and Jem Mace. The first heavyweight champion under the Marquess of Queensberry rules was John L. Sullivan, known as "The Boston Strong Boy." He weighed around 200 pounds when in shape and was a bare-knuckle champion. He was defeated by Jim Corbett on September 7, 1892, in 21 rounds.

It should also be noted that in recent years, the heavyweight title has become fractured amongst various sanctioning organizations, and so what was once known as the single "Heavyweight Champion," is now referred to as the "Undisputed Champion" as the one fighter that has defeated all the other titlists.

Professional champions

• List of heavyweight boxing champions

Kickboxing heavyweight

• International Kickboxing Federation (IKF) Heavyweight (Pro & Amateur) 195.1 lb to 215 lb (88.7 kg to 97.7 kg).

See also

• Boxing
• Boxing weight classes
• List of current world boxing champions