Tal Ben Haim, Chris Eagles and Simon Church are among 15 players who will be released by Charlton Athletic at the end of their deals this summer.
Defender Ben Haim featured 38 times this season, midfielder Eagles scored twice in 15 games, while striker Church netted three times in 19 outings.
Goalkeeper Neil Etheridge and defenders Roger Johnson, Oguchi Onyewu and Lawrie Wilson will also depart The Valley.
Meanwhile, eight development squad players will leave the club.
Jack Munns has already agreed a deal with Cheltenham, while Rhys Browne, Kurtis Cumberbatch, Kadell Daniel, Harry Gerard, Kieran Monlouis, Harry Osborne and Levander Pyke are being released.