Spireites will be without keeper Tommy Lee for six to eight weeks.
The three times Player of the Year damaged shoulder ligaments falling awkwardly in the midweek win over Oldham Athletic in the Johnstone’s Paint Trophy.
Caretaker boss Tommy Wright though revealed that no operation was necessary, as has been the case with left-back Nathan Smith’s ankle.
He’ll be out for a similar length of time. Lee’s absence will enable former Sheffield Wednesday man Richard O’Donnell to get his first Spireites start.
He appeared for a couple of minutes on Tuesday, but this will be his first start since a loan spell at Macclesfield Town back in April.
They are Wright’s only missing men ahead of their relatively short trip to Gary Mills’ York City tomorrow.
Promotion and the FA Trophy came the way of the Minstermen last season and they go into this game having won three on the trot, the latest being their 1-0 win at Rotherham United in midweek.
Wright indicates it’s unlikely there’ll be any fresh outfield in the squad for tomorrow, though he’s hoping to get a keeper as back up.
He said one deal was all but signed and then the unnamed player picked up a training injury to put the move on hold.
Summer signing Marc Richards is still searching for his opening goal but Wright’s not yet worried:
“He could easily have had three or four goals, so it’s not too much of a worry at the moment, he’s getting chances and sooner or later it’ll start going in the back of the net.
“We’ve got a lot of faith in him, he’s proven with his record over numerous years.”
With an away draw at the top of the table side and a cup win over a League One club, Wright’s early tenure has been promising.
But, when asked what Chairman Dave Allen had said to him of late, the Scot, tongue firmly in cheek, said: “Not a lot!”
He concluded by adding: “He’s not given me a contract, put it that way!”