As reported earlier in the week, Tommy Lee is suffering from a shoulder injury and after being operated on the 'keeper will likely miss the start of the new campaign.
Lee was ever-present for the Spireites in 2015/16, but that doesn't look likely to be the case again next term after the number one suffered the injury towards the end of last season.
Head of sports science and medicine Rodger Wylde explained the course of the injury being caused and identified: "In the second to last game of the season against Bury, Tommy went for a ball, an innocuous challenge came in but he felt his shoulder a little bit and we saw a specialist that week.
"A shoulder lesion was diagnosed, which is a tear within the joint, and for a goalkeeper that is quite a serious injury. He was allowed to carry on for the last game at Bradford, which Tommy wanted to do to make it 100% of appearances over the season."
"After the Bradford game he was assessed again and it was decided to leave the shoulder and see how it would go on doing just strength work for four weeks."
However, the period of rest didn't see the shoulder injury improve, meaning that Lee was required to go under the knife a fortnight ago.
"With the four weeks up Tommy was still struggling with it," said Wylde. "So an operation was necessary. He's now two weeks post-op and it's a recovery process that takes months not weeks, so he's very likely to miss the start of the season."
After Aaron Chapman left the club at the end of the season, Lee remains as the only recognised 'keeper on the Spireites' books, though manager Danny Wilson has confirmed that the club are on the hunt for high-quality goalkeepers to fill the void.