Grimsby boss Russell Slade has given defender Jason Crowe the weekend to decide if he will accept his offer of a new contract at Blundell Park.
"We've had a bit of dialogue. It is clear Jason has been touting himself to different clubs," Slade revealed.
"As far as I'm concerned, it is important that I target players to replace him, players that play in the areas of the pitch that he does.
"We have given him until Monday to make his mind up," he told the club website.