Motherwell have offered new deals to captain Stephen Craigan and midfielder Steve Jennings.
But manager Stuart McCall has released Maurice Ross, Francis Jeffers, Esteban Casagolda and Angelis Charalambous after their contracts expired.
Steven Meechan, and Under-19 players Liam Sloan, Gavin Griffin, Bradley Halsman are also leaving.
And winger Steve Jones and defender Gavin Gunning have left the Fir Park club after their loan deals ended.
Goalkeepers Lee Hollis and Tom Bradley, defender Ross McKinnon and strikers Steve Howarth and Jamie Pollock have been offered extended deals as McCall reshapes the team that finished sixth in the Scottish Premier League.