The defender suffered an ACL injury during Derby's 0-0 draw with Aston Villa.
Preston North End lost 1-0 at home to Derby County in tonight's EFL Championship encounter.
West Ham United are on the lookout for a new left-back.
Rams star Craig Forsyth is reportedly wanted by Championship rivals Blackburn.
Queens Park Rangers, Brighton & Hove Albion and Fulham are keen on signing Derby County defender Craig Forsyth.
Derby County defender Craig Forsyth has been ruled out for the rest of the season with a cruciate knee ligament injury.
Derby County star Craig Forsyth hopes he's done enough to keep his place in the team against Leeds United.
Derby County defender Craig Forsyth has been impressed by the calibre of players the club have signed already this summer.
Craig Forsyth has talked up former Derby boss, and soon to be Newcastle United manager, Steve McClaren,
Derby County will face Watford at home in the Championship on Friday.