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There are many players who missed the eleven starting positions on this list, so I thought it fitting to assemble a 'subs bench of legends' if you like.
Edwin van der Sar
When the giant Dutchman retired in 2011, he departed with four Premier League titles, one League Cup and three Champions League final appearances (winning one). Described as the natural heir to Schmeichel, van der Sar was composed, consistent and possessed excellent handling, as well as expert distribution.
Never one to crave the limelight, the Irishman was as dependable as they came. He won a hefty haul of medals, including Premier League, FA Cup and Champions League titles, and will be most fondly remembered for his trademark free-kicks and penalties. A true unsung hero.
The towering Norwegian joined in 1996 and although he won Premier League, FA Cup and Champions League medals, his career was curtailed by knee injuries. In his prime he was flawless; strong, committed, composed and adept at reading the game.
Money was nothing to 'Robbo'; if he lost that was the end of all things. He guided United through difficult times through the 1980s and was rewarded with two Premiership medals in the early 90s. 'Captain Marvel' was as tough and determined as they came.
Much is said about 'Becks,' but what can be certain was that at his time with the club he was the best crosser of the ball in the world. His tally of assists was through the roof and he won a fair number of games with his incredible dead-ball ability. Deservedly a winner of a host of accolades, both personal and for the club.
Ole Gunnar Solskjaer
On a 'subs bench of legends' it would be criminal not to include the man who scored four in ten minutes coming off the bench against Nott'm Forest. A clinical finisher and a real threat to defenders late on in the game. Oh, and he scored that goal in the 1999 Champions League final. Enough said.
Ruud van Nistelrooy
He scored 150 goals in 219 matches for the club and arguably deserved more honours than he received (one Premiership, one FA Cup and one League Cup medal apiece). Deadly in the box, 'van the Man' was a true goal machine, and would have made the starting XI were it not for a certain Mr. Rooney. The free-scoring Dutchman nevertheless has his place in United history as being their all-time goalscorer in Europe.