Sky Sports understands a host of clubs are eyeing moves for Carlisle defender Lubomir Michalik.
Michalik is out of contract this summer and has yet to agree a new deal at Brunton Park.
The news has alerted a host of clubs to the Slovakian international's possible availability on a free transfer this summer.
Barnsley and League One bound duo Swindon and Crawley Town are thought to be keen on signing the big central defender as they look to bolster their defensive options.
Carlisle would be reluctant to lose Michalik with the 28-year-old establishing himself as a key player in Greg Abbott's side since his arrival from Leeds in January 2011.