Greg Halford has joined the Pompey exodus by completing a move to Nottingham Forest.
The defender, who had two years left on his Fratton contract, played 77 games for the Blues after initially arriving on loan from Wolves.
Blues boss Michael Appleton said: “Greg is a very good footballer who is attractive to teams because he can play in a variety of positions and is confident in all of them.
“I’m sure he will do very well and kick on with his career.”
The 27-year-old made his Pompey debut in a 1-0 win at Millwall in October 2010.
Comfortable at centre-half, full-back and in midfield, he proved a key asset to Pompey during nearly two season at the club.
A long-throw specialist and superb penalty taker, he scored 12 goals for the club, including seven last season which made him second-top scorer behind David Norris.
He netted five penalties in 2011/12, including two in seven minutes in a dramatic 4-3 win at Doncaster in April.