William John Heaton Greenwood, MBE (born 20 October 1972) is an English former rugby union player who played for Leicester Tigers and Harlequins and was a member of England's 2003 World Cup-winning team and the 1997 British & Irish Lions.

[2] As a schoolboy, he was also a talented cricketer and played for the Lancashire Schools representative team before ultimately deciding to concentrate on rugby.

In 2000 he moved back to Harlequins after succumbing to poor form, not helped by the arrival of Australian Pat Howard that prevented him from getting first team rugby.

He had already picked up an RFU Cup winner's medal with Leicester but tasted defeat in the final of the same competition with NEC Harlequins, at the hands of Newcastle Falcons in 2001.

[8] He was selected for the British & Irish Lions' tour to South Africa still uncapped, and ahead of then England captain Phil de Glanville, in the summer of 1997.

Although he had rushed home due to his wife's difficult pregnancy, he returned to the side, scoring England's only try against South Africa, when he followed up to touch down after a Lewis Moody charge down.

In 2019, he was on the first panel to determine the World Rugby women's-15s player-of-the-year award with Melodie Robinson, Danielle Waterman, Liza Burgess, Lynne Cantwell, Fiona Coghlan, Gaëlle Mignot, Jillion Potter, Stephen Jones, and Karl Te Nana.

[24] Greenwood was awarded a Doctor of Civil Law honoris causa by his alma mater Durham University in January 2006.

[25] In August 2014, Greenwood was one of 200 public figures who were signatories to a letter to The Guardian opposing Scottish independence in the run-up to September's referendum on that issue.