David Deron Haye is a British former professional boxer who competed between 2002 and 2018. He held the unified, and the Ring magazine cruiserweight championship from 2007 to 2008; and the WBA heavyweight title from 2009 to 2011. At regional level, he held the European cruiserweight title from 2005 to 2007. As an amateur, he was the first British boxer to reach the final of the World Championships, where he won a silver medal in 2001.
Haye 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. 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.
