"We can confirm that an offer has been put to us for Lewis from Crawley Town," Chief operating officer Paul Douglas told the clubs website this afternoon.
"The approach has been turned down. The club is under no pressure to sell any of our players and Lewis is part of our long term plans for the future success of the club."
The Red Devils had tabled a bid believed to be in the region of £100,000 for Grabban, who has hit 15 goals this season.