Several scouts have been spotted in the stands at Glanford Park this season, with fans trying to guess who they're keeping an eye on.
According to reports in a Sunday newspaper, at least five clubs are following the progress of 21-year-old striker Hayes.
The former Norwich trainee joined the club towards the end of 2001-02 season, after the Iron took over his YT contract at Norwich City.
Championship side Brighton have been linked with him, as have League One sides Bristol City, Blackpool, Doncaster and Huddersfield.