A mind-blowing 15 first-team players could eventually walk away, leaving new head coach and sporting director with a huge amount of work to do over the summer.
Five of those are the loanees currently calling the south coast home. But 10 are senior players currently on permanent deals, individuals who could walk away for nothing if they so wished.
The Blues are yet to enter fresh talks with anyone whose deal is now into it’s final five months, with Mousinho understandably wanting time before making a call.
Finances, a player’s desire to stay and offers from elsewhere are just some of the factors that must be considered before any decision is made.
But who is likely to stay from that 10 and who could eventually end up leaving?
We have a look at what could unfold in May.
5. Ryan Tunnicliffe
The midfielder has gone from Pompey's forgotten man to someone we currently can't do without. Injuries in the Blues midfield have no doubt elevated Tunnicliffe to that lofty position, but he has nevertheless stepped up when called upon. Is it enough to warrant a new deal, though? Probably not. A change in personnel is needed in that midfield department to make Pompey a top-six side at least and the former Luton man will likely be someone who makes way. Photo: Jez Tighe
6. Connor Ogilvie
John Mousinho and Rich Hughes need to build on some solid Pompey foundations this summer. Ogilvie is one of those key Blues pillars and has to remain at Fratton Park. The option Pompey have on the left-back should make that happen. Some quality and consistent competition for the defender would be good, though. Photo: Jason Brown
7. Clark Robertson
At times like these, tough decisions need to be made - and Robertson's future falls into that category. The Scot is yet another one whose time at Fratton Park has been hampered by injury. That's not his fault, but the Blues need players who can perform week in, week out. Since arriving in the summer of 2021, Clarke has played 50 of the Blues' 95 games to date. - that's just over half. Is currently out injured and that's allowed Ryley Towler to establish himself in the centre of defence and push the 29-year-old further down the pecking order. Photo: Jason Brown
8. Kieron Freeman
You have to feel for the right-back, who continues to be overlooked - despite a change in manager. On that basis alone, his most recent spell at Fratton Park has a certain inevitability about it. Photo: Paul Thompson