Skysports.com understands Derby are set to hand Dean Leacock a free transfer as Nigel Clough continues to revamp his squad.
The Rams have made an impressive start to the new Championship campaign and are currently third in the table.
Clough has brought in a number of players over the summer as he assembles a squad capable of challenging for promotion.
Leacock, 27, has been at Derby since 2006 and has clocked up over 100 appearances for the club, but currently has just a year left on his present deal.
Clough, however, would be prepared to sacrifice the towering defender to free up some much needed funds to buy a striker.
The Rams have been heavily linked with Leicester's Martyn Waghorn all summer, but they could be beaten to his signature by Hull.