Veteran central defender Gordon Greer, who is leaving Blackburn this summer, is the latest player to be linked with the Blues along with a number of other clubs.
According to Teamtalk, recently relegated Rovers want to keep the 36-year-old, despite the Lancastrians announcing his release earlier today.
They also claim Town, Burton, Bradford, Bolton, Hibernian, Hearts and former club Kilmarnock are also keen on signing the Glasgow-born defender.
Greer moved to Ewood Park last summer having left Brighton after six years. The 11-times-capped Scotland international has also spent time with Clyde, Stockport County (loan), Doncaster and Swindon.
While the Blues will almost certainly look to add to their centre-halves this summer with Christophe Berra having departed, they’re more likely to target a left-sided player to compete with Tommy Smith rather than another experienced right footer with skipper Luke Chambers, Adam Webster and Steven Taylor, who has been invited back for pre-season, all right-sided.