Cardiff will allow long-serving Kevin McNaughton to leave this summer along with Danny Gabbidon and Nicky Maynard.
Highly-rated Atletico Madrid midfielder Saul Niguez has signed a new five-year contract.
Roberto Di Matteo has insisted he does not feel like a dead man walking ahead of Chelsea's Champions League final against Bayern Munich.
It was claimed this week that caretaker Blues boss Di Matteo was resigned to being snubbed in his bid to land the manager's job full-time, regardless of the outcome of next Saturday's showdown at the Allianz Arena.
On Thursday, Chelsea chief executive Ron Gourlay reassured Di Matteo no decision on his future would be made until after that game, but that was immediately followed by reports owner Roman Abramovich was hell bent on persuading Pep Guardiola to take over this summer.
Asked if he felt like a "goner", Di Matteo said: "No, no, no. I feel part of this club. I focus on the team and the players, and what we're looking forward to in the next eight days."
'Dead man walking' was the moniker famously given to the first manager jettisoned by billionaire Russian Abramovich, Claudio Ranieri, who was sacked after reaching the Champions League semi-finals.
Abramovich also had no qualms axing Avram Grant four years ago, despite the Israeli leading Chelsea to their first final.
Di Matteo has already improved upon both those feats by winning the FA Cup during what has been a real Houdini act since his appointment just over two months ago.
But his number one target was qualifying for next season's Champions League and - having managed only a sixth-placed finish in the Barclays Premier League - he might have given Abramovich an excuse for overlooking him if he does not do so by winning next Saturday.
Asked if he felt his job was on the line, Di Matteo said: "I'm not thinking about that. It's not about me, it's about Chelsea. The players have a fantastic opportunity to achieve something very special."
Di Matteo appeared to be genuinely in the dark about his future upon being asked to assess his tenure ahead of what could be his final home game in charge against Blackburn on Sunday.
"I've very much enjoyed my time," he said, refusing to be drawn on suggestions the club might keep him hanging on until the end of his contract rather than putting him out of his misery after next weekend.
Di Matteo was also typically taciturn on what Abramovich might be thinking - about anything.
"That's a question you'd have to ask him," he said.
"Certainly, Chelsea as a club, we always expect to be challenging at the top.
"It's been a difficult season with ups and downs, but we've still got two games and one that could potentially still turn it into a great season."
Admitting he personally would not have settled for an FA Cup win and failure to qualify for the Champions League upon his appointment, Di Matteo nevertheless had no regrets.
"Our schedule has been crazy," he said.
"We've played many more games than all our opposition, but I have no regrets.
"We have pushed the players and they've responded fantastically well.
"To be able to play in the Champions League final, for these players, is a magnificent opportunity for them and the club."
He added: "The effort and commitment from the players has been fantastic. I couldn't have asked for more.
"We've always tried to win the games we've played.
"Sometimes, the opposition was better, but we've tried our best."
Sunday's game could also be Didier Drogba's last at Stamford Bridge, with the striker set to quit Chelsea this summer when his contract expires.
Gourlay yesterday said an 11th-hour agreement to extend it could yet be reached and Di Matteo insisted Drogba was "absolutely" still good enough to stay at the club.
Whether Drogba is involved or not on Sunday remains to be seen, with Di Matteo confirming he would field a team containing "one or two youngsters" for what is a dead rubber.
He and Drogba are certain to get a rousing send-off during any post-match lap of honour after their feats for the club both this season and before.
"I'll always have a good relationship with the fans," Di Matteo said.
"I'm an ex-player here. I've got a legacy and no-one would take that away."