Chesterfield's Gregor Robertson and Jack Lester have signed new deals to stay with the club.
Robertson's previous agreement had expired but he has now put pen-to-paper on a new one-year deal.
He is the fourth out-of-contract player to commit his future to the Spireites this summer after Aaron Downes, Derek Niven and Danny Hall.
Striker Jack Lester has inked a contract extension to keep him at Chesterfield until 2011.
The 33-year-old has been a prolific goalscorer for the club since joining from Nottingham Forest in 2007, netting 50 goals in two seasons.