David Holdsworth's bid to keep Chris Bush and Jake Thomson has been plunged into doubt after Lincoln City began a fresh round of cost-cutting.
The Imps this week released four players in a bid to save money as Paul Robson, Jake Turner, Elliott Green and Dan Coupland all left the club.
Loan deals for Thomson and Bush, who signed from Newport and Gateshead respectively, are now under the microscope with Holdsworth unsure over the duo's future.
Both players are due to return to their parent clubs next Monday unless the Imps decide to extend their stay.
The decision to review Lincoln's squad comes just one week after chief executive Steve Prescott admitted the postponed game against Wrexham cost the Imps £10,000.
Holdsworth said: "We have released several players which has saved us a considerable amount of money.
"These were looked at by myself and the chairman in terms of saving money and also helping the club's cash flow.
"It's been a tough few weeks for the club in terms of finance, so while it leaves me short of numbers, certainly defensively, I will do all I can to work and help the chairman.
"John Nutter, Peter Bore, Paul Robson, young Elliot and Dan along with Jake Turner have all been great to work with and all contributed – I wish them all well.
"As for Bushy and Jake, I'm not sure as to whether we can keep them, but we will see if anything happens there this weekend."
Despite slashing the squad, Holdsworth is still clinging to the hope he can add one signing before the transfer window closes at midnight.
Lincoln only have six defenders on their books with Dan Gray, Andrew Boyce, Tom Miller, Scott Garner, Peter Gilbert and Bush.
A crippling midfield injury crisis, which has deprived Holdsworth of Alan Power, Gary Mills and Mo Fofana, has been an immediate concern.
But now he is hopeful of sorting his defence out ahead of Saturday's trip to Braintree.
"I would like to add a defender if possible," he said.
"Whether we can, we will have to see.
"I don't want to go into the final third of the season without at least one covering player, especially as up to last week, we had three defenders out of action. We will see what we can do."