The likes of Brett Pitman and Oli Hawkins were allowed to leave following the expiry of their contracts.
Meanwhile, Christian Burgess departed on a free transfer after he agreed to join Royale Union Saint-Gilloise in Belguim.
The defender turned down the offer of a new Blues deal in favour of a new challenge elsewhere – something that Nathan Thompson chose to do a year earlier after he allowed his contract to run down.
In total, seven players – not including those on loan – have left Fratton Park since the season came to an end at the Kassam Stadium, with the club still negotiating a new deal with Lee Brown.
However, that figure could be even higher next summer, with 11 players now in the final year of their Pompey deals.
Wage cap proposals will most likely make it harder for Pompey to negotiate deals for any player they want to keep.
So here are the XI players who are now less than 12 months away from being possible transfer transfers – unless the Blues can find a way of keeping them.
5. Jack Whatmough
The centre-half has played just twice since February 2019 because of injury and his decision to stay away during the coronavirus crisis, putting the health and well being of his young family first. Signed Blues extension in January 2019. Has made 98 Pompey appearances in total. Photo: Simon Davies
6. Gareth Evans
The fans' favourite has made 215 appearance since arriving in 2015 on a free transfer - but found game time hard to come by last season. Photo: Daniel Chesterton
7. Ben Close
Featured 44 times this season but failed to even make the bench for Pompey's play-off double-header against Oxford. Blues have an option on the midfielder at the end of the 2020-21 campaign Photo: Joe Pepler
8. Ryan Williams
The winger is a favourite of manager Kenny Jackett and made 36 appearances last season following his return to the club on a free transfer. Scored three goals last term. Photo: Joe Pepler