Among them will be a swathe of League One players, who see their existing deals come to a close.
Some will be desperate to find any club, while others will be flooded with offers as they cherry pick their next destination.
We’ve highlighted some of the best talents Pompey could identify, who are not currently tied down beyond the summer.
9. Joe Ward - Peterborough United
Right-sided midfielder was linked with Pompey in the summer and now will be a free agent, as things stand. Photo: Joe Dent
10. Toby Savin - Accrington
Keeper looks to be on his way this summer with plenty of admiring glances from clubs - including Spurs. Photo: David Rogers
11. George Byers - Sheffield Wednesday
Contract comes to a close this summer, though his side hold a 12-month option. May depend where the Owls are operating next season as to what happens. Photo: Steve Ellis Steve Ellis
12. Niall Ennis - Plymouth
Ten goals this season for former Wolves youngster who will, no doubt, have plenty of clubs tracking his situation. Photo: Barry Zee