Some were sold and some were sent out on loan.
The PT has had a look to see how they’ve been getting on, good or bad
5. DAN BUTLER
Another promotion-winning Posh defender who left for League One rivals Stevenage on a free transfer in the summer. He was an ever-present in the first 12 league games of this season before missing last Saturday's 3-0 defeat at Blackpool because of suspension after collecting five yellow cards. Photo: Pete Norton
6. CHRISTY PYM
The goalkeeper was effectively cast out of Posh for the best part of two seasons, but finally left for good in the summer when signing permanently for the Mansfield side that had him on loan last season. And Pym been a star man for the Stags. He hasn't finished on the losing side in 16 matches this season and starred in a penalty shootout win in the Carabao Cup over Posh, a result he seemed to enjoy. Photo: Stu Forster
7. FRANKIE KENT
The popular centre-back chose a new adventure in Scottish football with Hearts with the Premiership club paying an undisclosed fee for the 27 year-old. Kent has started all eight league games for his new club who sit fourth in the table and he made his debut in European football, albeit briefly as Hearts were thrashed 6-1 on aggregate by Greek side PAOK Salonika in the European Conference League. Hearts have played 14 competitive matches this season and Kent has started them all. Photo: s
8. OLIVER NORBURN
The midfielder finally got his move up North 18 months after he first asked for it by joining League One rivals Blackpool for an undisclosed fee. He's started all 12 of Blackpool's League One matches. The red card he picked up in a defeat at Lincoln led to a suspension from an EFL Cup match. Blackpool are eighth, just two points behind Posh. Photo: Joe Dent