Queens Park Rangers are reportedly anticipating a lot of departures in the upcoming transfer window.
The R's are likely to make wholesale changes to their squad, regardless of what division they are in next season, and it seems that their defensive line-up could be much changed next term.
Ferdinand is due to retire at the end of the season, while the R's are said to be reluctantly resigned to parting ways with Caulker, Dunne and Onuoha in the coming months.
Caulker, Dunne and Onuoha have all had decent seasons, despite QPR's struggles this term, and it would be a blow for the club to lose them.
If QPR do lose all four players then they will have to make some renovations to their back-line and it will be intriguing to see their transfer policy now that Harry Redknapp has left.
The R's never had a defined model in the transfer window under Redknapp, but they are likely to want to have a clearer direction, as they look to the future.
The calibre of the replacements QPR can attract is likely to be defined by what league they are in, with the side still fighting for survival.
If Chris Ramsey can guide the London outfit to safety then they will have the funds to spend on the team, but a relegation could mean that there are more departures than additions at Loftus Road in the coming months.