Skysports.com understands a number of clubs are tracking West Ham defender Danny Gabbidon.
Gabbidon's current contract expires at the end of the season and as yet no new deal has been agreed.
It means the former Wales international could leave Upton Park on a free transfer in the summer, with several interested sides waiting in the wings to sign him.
Gabbidon has been one of West Ham's shining lights in a disappointing season for the Hammers with the versatile defender proving his fitness after spells on the sidelines.
Premier League duo Birmingham and West Brom are both thought to be keeping tabs on Gabbidon's situation at Upton Park.
Former club Cardiff could also offer Gabbidon a move away from West Ham if he fails to agree a new deal.
The trio could move for Gabbidon if West Ham decide to sell him in January for a cut-price fee rather than risk losing him for nothing in the summer.