Hurst as Opie , Johnny Lewis as Kip 'Half Sack' Epps , William Lucking as Piney , Theo Rossi as Juice , Maggie Siff as Tara and Ron Perlman as Clay . Major supporting or recurring characters include Drea de Matteo as Jax's ex-wife Wendy Case, Sprague Grayden as Opie's wife