Reds' defender Danny Simpson has signed a new contract which will keep him at the club until 2010.
The 20-year-old, who joined in July 2003, spent last season out on loan, gaining significent first team experience along the way.
After a successful four-month spell at Royal Antwerp at the start of the 2006/07 campaign, Simpson was snapped up by Sunderland boss Roy Keane for the remainder of the season.
Simpson, along with fellow United loanee Jonny Evans, became an integral part of the Black Cats defence as Keane's side clinched promotion to the Premier League.
Simpson is now a fully fledged member of United's first team squad following some impressive displays in pre-season.