The 33-year-old is on the lookout for a new club following his release at the expiration of his contract at the end of last month.
And David Connolly, the former Republic of Ireland forward who had spells with Wigan and Sunderland in the Premier League, believes the Red Devils could use a player like Cahill as Ole Gunnar Solskjaer attempts to rebuild his playing squad.
United are trying to sign Harry Maguire, the Leicester centre-back, but risk being priced out of a deal by his huge £90million valuation, while they have also faced resistance in their attempts to bring in Issa Diop from West Ham.
Connolly, however, believes there are alternate targets United should be looking at.
“Now, what harm would it be to take a Gary Cahill, with all his experience and winners’ medals, into the building? It’s that experience, you might have lost a lot, well get someone in that would give that!
“Look, he’s not going to bring the ball out from the back like if they had a Harry Maguire. But he’s a top, top centre-half who looks as fit as a flea.
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“Obviously he hasn’t played that much, but he looks after himself. So why not someone like that? Under Sir Alex [Ferguson], he would always make an ageing, loanee signing, a Henrik Larsson or they had [Zlatan] Ibrahimovic [under Jose Mourinho] for example.
“Someone like that at the back would do terrifically for them.”
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