Former Yeovil and Portsmouth midfielder Wes Fogden says stepping out of full-time football will protect his body.
Portsmouth manager Paul Cook says the door has not been closed on out-of-contract midfielder Danny Hollands.
Portsmouth sign striker Curtis Main from Doncaster Rovers for an undisclosed fee on a two-year deal.
Cambridge United sign forward Adam McGurk on a two-year deal from fellow League Two side Portsmouth.
Portsmouth midfielder Gareth Evans will miss the start of the new season as he continues to recover from injury.
National League side Forest Green Rovers sign striker Matt Tubbs from Portsmouth on a one-year deal.
Grimsby sign former Portsmouth midfielder Ben Davies on a two-year contract and Scunthorpe forward Dominic Vose on loan.
Grimsby Town sign former Portsmouth midfielder Ben Davies on a two-year contract.
Portsmouth sign Milan Lalkovic from Walsall after the two clubs reached a compensation agreement.