Ched Evans, Matt Olosunde, Sean Maguire and Patrick Bauer have all been sidelined in recent weeks.
Frankie McAvoy is hopeful there will be some returns ahead of their Championship fixture against Cardiff City.
The Lilywhites boss told the Lancashire Post: “Pat was back training on Thursday so hopefully he is back in contention for Saturday.
“Pat and Sean will both be in training. Alan Browne is back, he trained on Tuesday and Matt Olosunde played an hour of the game on Tuesday, which is good.
“Ched has been training, we’re gradually bringing him back in, he will be in a full session today.
“That’s pleasing for us as well – we are looking okay on that front, fingers crossed we can get them fully fit as soon as."
Here are the best of today's rumours...
5. Birmingham City boss not worried about defender exit
Birmingham City boss Lee Bowyer has said he 'doesn't see why' Wolverhampton Wanderers would recall defender Dion Sanderson back to Molineux. Wolves are set to lose both Romain Saiss and Willy Boly to the upcoming Africa Cup of Nations. (Football League World) Photo: Ryan Pierse
6. Luton Town have option to extend Hatters star's contract
Nathan Jones has hinted that the Hatters have an option to extend Simon Sluga's contract, with his deal set to expire at the end of the season. The goalkeeper has kept 26 clean sheets in 92 appearances for Luton. (Luton Today) Photo: Alex Pantling
7. Preston North End join race to sign Lincoln City starlet
Preston North End have joined the race to sign Lincoln City ace Anthony Scully in the January window. The likes of Millwall, Blackburn Rovers and Barnsley are also interested. (Football League World) Photo: Justin Setterfield
8. Ex-Aston Villa defender joins Middlesbrough
Middlesbrough have confirmed the signing of ex-Aston Villa and Swansea City defender Neil Taylor in a short-term deal. The former Wales international has been a free agent since his departure from Villa at the end of last season. (Middlesbrough FC) Photo: Pool