Midfielder Mark Randall, 23, has left Spireites as his contract has expired and will not be renewed.
Manager Paul Cook said: “We thank Mark for everything he’s done and wish him every success for the future.”
Randall joined from Arsenal two years ago having had an unsuccessful loan spell with Rotherham United.
Meanwhile work on what’s going to be known as The Hub is well under way at the Proact Stadium.
The new community sports facility received a £350,000 grant from the Premier League Community Facility Fund which meant work could proceed as planned.
Following the move to Whittington Moor, the Chesterfield FC Community Trust was created and they have worked tirelessly to create the plans and gather together the financing for the facility that sits within the stadium’s East Stand.
The new facilities will help the club realise its aspirations of providing a wide range of sporting activities to the community, increasing participation of young people and under-represented groups in community sport and promoting community cohesion through sport.
The development includes:
Ground Floor: U7s indoor football area, club room, hydrotherapy pool,fitness suite, two changing rooms, soft play area and café. First Floor: multi-purpose sports and community room, day care centre/learning zones.
Richard Scudamore, Premier League chief executive, said: “Premier League funding helped develop the stadium into something that is not only a strong community asset but is valued by English football. “Now the Proact is set to become an even more important hub thanks to the Fund. Their innovative use is to be applauded.”
John Croot, Chesterfield FC Community Trust director, added: “ “I don’t know of a facility like it in the Football League. We promised the town a community stadium here and we’re fulfilling our promise.”