FILE - This is a Saturday, July 2, 2011 file photo of David Haye of Britain, right. as he trades punches with Wladimir Klitschko of the Ukraine, during their world heavyweight unification title bout in Hamburg, Germany. The British Boxing Board of Control said former WBA heavyweight champion David Haye does not want to renew his license to fight. The British Boxing Board of Control general secretary Robert Smith told the BBC on Tuesday Oct. 11, 2011 that his organization has received confirmation in an email from Haye, who lost a heavyweight unification bout to Wladimir Klitschko in July. (AP Photo/Martin Meissner, File)
LONDON (AP) — Former heavyweight champion David Haye has announced his retirement on his birthday Thursday, fulfilling his promise to quit by the time he reached 31.
The British fighter's last bout was a loss on points in July to Wladimir Klitschko, who added Haye's WBA title to his own WBO and IBF belts.
Starting off as a cruiserweight before moving up to heavyweight, Haye won 25 of his 27 fights as a professional.
He beat Russia's Nikolay Valuev in November 2009 to capture the WBA title, successfully defending it against John Ruiz and Audley Harrison.