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Irwin is surely the most consistent and unassuming player to play for United.
In 12 years at United, he made 529 appearances and scored 33 goals.
Equally dependable at right-back or left-back, he was among the first names on the team-sheet during one of the club's most successful era's.
So solid was he that Sir Bobby Charlton says in 'Sir Bobby Charlton - My Manchester United Years - The Autobiography' : "You never worried about Denis Irwin; I remember him once making a mistake, an occasion so rare, I found myself thinking, 'Really, I never thought I would see that.'''
In 2003 he was named on the Premiership Team of the decade. In fact, according to Goal.com Alan Hansen said at the time: "In any team of the decade, the full-back slots are already nailed down—Denis Irwin at right-back and Denis Irwin at left-back.''
On top of his impressive legacy is the fact that he is one of the reasons Eric Cantona joined United.
At the time, United were in the market for a striker after Dion Dublin broke his leg.
Names like Brian Deane and David Hirst were mentioned, but no one thought Leeds would sell Cantona.
Alex Ferguson was sitting in Martin Edwards office one day when Leeds United rang to inquire about signing Irwin.
Almost jokingly he asked would they trade Cantona and when he heard the pause on the other end of the phone he knew he had his man.
The rest is history.