Here are our suggestions! There are former Posh players and future top-class stars amongst them.
Let us know which League One players you think Posh boss Darren Ferguson could sign to enhace his current squad.
9.
Fleetwood Town: DANNY ANDREW (red). Few would have predicted this left-back would have gone on to have a decent League One career when he left Posh many years ago, but the set-piece specialist has been involved in back-to-back promotion pushes with Doncaster and Fleetwood. | Joe Dent/JMP Photo: Midlands
10.
Gillingham: JACK TUCKER is a high-class young centre-back who has enjoyed a breakthrough season under Steve Evans. Tucker and Frankie Kent would be a classy combination in any defence. | Joe Dent/JMP Photo: Midlands
11.
Ipswich Town: GWION EDWARDS. What's he doing wasting his time under the miserable management of Paul Lambert when he could be flourishing in the freedom Darren Ferguson would give him? A pacy, counter-attacking midfielder who would fit right into the current Posh formation. | Joe Dent/JMP Photo: Midlands
12.
Lincoln City: JOE MORRELL is a dynamic, all-action midfielder who has enjoyed an excellent season with the Imps. | Joe Dent/JMP Photo: Midlands