Rio Ferdinand, Patrice Evra, Ryan Giggs, Nemanja Vidic and Michael Carrick are all out of contract at the end of the current season - new United manager has a huge decision to make.
Between the four veterans - with the exception of Carrick - there's a total of 29 Premier League winners medals and 10 Champions league medals.
Can Moyes afford to lose such an extensive amount of experience overnight?
1. Ryan Giggs
The Welsh wing wizard has defied age to be where he is today.
It is definitely time that Giggs calls it a day on his trophy-laden career at Old Trafford.
He is not doing the team any favours on the pitch with his ageing legs.
Sentiments aside, perhaps he will be able to impart his experience and knowledge in another form - coaching.
A suitable and ready candidate to fill his boots on the left could very well be the much talked about Adnan Januzaj who has lit up Old Trafford.
2. Rio Ferdinand
One half of the rock solid defensive partnership that ushered in yet another golden era for United.
He has sadly lost his speed and even a little of his concentration. It doesn't seem like Ferdinand can continue to perform at the highest level against quality opponents in the domestic league as well as Europe and should not be given a contract extension.
Replacing a once world-class defender will not be easy but there are few in the market that could fill his boots.
With the current crop of younger centre-backs not ready to step up in to the role of being a defensive leader, the purchase of Mats Hummels would be ideal for United.
3. Nemanja Vidic
Despite a couple of errors so far in the season, Vidic still commands a significant presence in the back-line and should be kept for at least one more season.
His abilities have not diminished as much as his partner-in-crime Ferdinand and he still looks to have plenty to offer for at least another one to two more years.
4. Michael Carrick
Look up consistency in the dictionary and chances are you'll see a picture of this man. He has been a key player for United this season and his performances and passes have been superb at times.
As a deep lying play maker he still has much to offer. His calm and collected nature allows him to dictate the pace of a game as well as split opposing defences from unearthly distances.
5. Patrice Evra
The cracks are showing in the Frenchman's performances, but it is too soon to discard his experience and personality.
His form over the last season or two has been patchy, and that inconsistency has carried through to the current campaign.
The manager could perhaps rotate him with other options such as Fabio to keep him sharp and hungry to perform well.
United should also look to Southampton's Luke Shaw as a potential long term replacement for Evra and perhaps bring him in at the end of the current season.
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