David Moyes is understood to be willing to sanction a Hammers defence clear out if bids matching club valuations come in for West Ham defenders this summer.
While Angelo Ogbonna, Issa Diop and Ben Johnson appear to be safe for now the manager would be unlikley to stand in the way of Aaron Cresswell, Ryan Fredericks, Fabian Balbuena and/or Arthur Masuaku if bids were received in the summer transfer window.
As reported earlier this week the 57-year-old manager will make incoming defenders his priority this summer as he looks to add two or three new faces to his squad with limited funds.
The manager is thought to be looking at a number of left-backs, right-backs and central defenders to strengthen the squad and the Hammer defence and was spotted at several championship games scouting targets.
The Hammers conceded 62 goals last season and the 57-year-old manager wants to make that his number one priority.