Cameron has been a regular at right-back for Stoke for the last two years and missed just one game in the Premier League last season, but Phil Bardsley's arrival on a free transfer from Sunderland puts his place in the starting line-up under threat.
The 29-year-old USA international would prefer to play in a more central role but Mark Hughes has already increased his options in midfield with the signing of Steve Sidwell from Fulham, while Robert Huth's return to fitness and the capture of 22-year-old Dionatan Teixeira leaves the Potters well stocked in central defence.
With Cameron's future in doubt, Sunderland, Hull, West Brom, Swansea and Southampton plus German sides including Schalke 04 and Eintracht Frankfurt have all expressed interest in the American this summer, according to the Stoke Sentinel.
Hughes, who has also signed Mame Biram Diouf and Bojan Krkic this summer, is still looking to do more business before the start of the season and, although Cameron's versatility could prove useful, the Potters boss may be tempted to cash in on a player that is likely to demand a fee in excess of the £2million former manager Tony Pulis spent to land him from Houston Dynamo two years ago.
Cameron has only joined up with the Stoke squad this week after World Cup duty and is expected to feature in their fourth pre-season friendly of the summer at Blackburn on Sunday.