Dean Henderson is looking for a loan move in the January transfer window.
The 23-year old goalkeeper has barely featured for Manchester United this season despite a successful loan spell at Sheffield United last season.
He might be interested in a loan move in January in order to cement a place in the England international squad.
Former Leeds goalkeeper Martyn believes Henderson would be a perfect signing for the Whites but that might upset current goalkeepers Illan Meslier and Kiko Casilla.
Martyn said: “He would be a good signing, given how well he played for Sheffield United.
“It would be harsh on Meslier, but he’s only 20. He’s one for the future. I’d like a more senior goalkeeper, but there is no reason to change it.
“If they go after Henderson, it’s worrying for Casilla.
“It means he is not turning to him, and if you’re trying to get Henderson on loan – it needs to be with a view to buying it. If Man United don’t want to sell, you’re upsetting your goalkeeping department.
“If they were in to buy him, and Man United were to let him go – I would be happier that route. To get him on loan it doesn’t send the best vibes to Meslier, it says to Kiko that you aren’t good enough.”