Chris Perry is believed to be interesting both Birmingham and West Brom.
The 33-year-old is available on a free transfer after being released by new Charlton manager Iain Dowie.
The Midlands duo - both relegated from The Premiership last season - are now set to go head-to-head in a bid to land former Tottenham and Wimbledon man.
"We are looking to bring at least one more player in and we are in discussions as we speak," admitted Blues boss Steve Bruce.
"We expect, or hope, to do something in the next couple of days."
The two clubs are also thought to be interested in Tottenham's Calum Davenport.