Frank Lampard, Ashley Cole and Samuel Eto'o all look to be on their way out of Chelsea this summer as their contracts approach expiry.
The club have not made any comment but the trio are included on the list of released players submitted to the Premier League. Although they could yet be retained, the list indicates that offers to extend their deals have not been made.
Cole, 33, had recently said on Twitter that he expected to leave Stamford Bridge following a season in which he lost his place in the team to Cesar Azpilicueta.
Eto'o, too, had appeared certain to move on after just one year with the Blues, with the Cameroon international criticising coach Jose Mourinho following remarks he made earlier in the campaign about his age.
However, Lampard, 35, was thought likely to sign an extension along with club captain John Terry, who finally committed to a new deal earlier this month.
Also departing the club are backup goalkeepers Mark Schwarzer, who deputised for Petr Cech at the end of the season, and Hilario, who had been with the Blues since 2006.
Milan Lalkovic and Sam Hutchinson are among the others to exit. Hutchinson had come through the youth ranks at Chelsea before being forced into retirement in 2010 only to re-sign for the club in 2011 after an improvement in his knee injury.