David Haye

David Deron Haye (born 13 October 1980) is a British former professional boxer who competed between 2002 and 2018. He held multiple world championships in two weight classes, and was the first British boxer to reach the final of the World Amateur Boxing Championships, where he won a silver medal in 2001.

As a professional, Haye became a unified cruiserweight world champion in 2008, winning three of the four major world titles, as well as the Ring magazine and lineal titles. He was ranked by BoxRec as the world's No.1 cruiserweight from 2005 to 2007, and was also ranked within ten best in 2003 and 2004. In 2008 he moved up to heavyweight, winning the WBA title in 2009 after defeating Nikolai Valuev, who had a size advantage of 9 inches (23 cm) in height and 99 pounds (45 kg) in weight over Haye. Along with Evander Holyfield and Oleksandr Usyk, Haye is one of only three boxers in history to have unified the cruiserweight world titles and become a world heavyweight champion. As of September 2021, BoxRec ranks Haye as the 100th greatest British fighter of all time.

Haye founded his own boxing promotional firm, Hayemaker Promotions, in 2008. He became a vegan in 2014 and launched his own range of vegan protein powder later that year.