Goalkeeper Ricardo is among 10 players that will leave Leicester City upon the completion of their existing contracts this summer.
Robert Ambrusics, Ashley Chambers, Nathan Hicks, Jorrin John, Craig King, Ben Milnes, Luke O'Neill, Aman Verma and Adi Yussuf will not be offered extensions to their current deals, which expire on June 30.
The Club would like to place on record its thanks to all 10 players for their hard work during their time with the Foxes and wish them well in the future.
A decision on the future of Aleksandar Tunchev, whose contract is also due to expire next month, will be deferred until a later date. The Bulgarian defender has missed most of the last two years through injury, but will be invited to join the Foxes for pre-season training, having returned to action towards the end of the 2010/11 campaign.