Actually it looks like 15 characters turned up on SOA. A few of them key roles
Fifteen members of the cast of Deadwood (2004) also starred in Sons of Anarchy (2008). The list includes Tony Swift (Prospector/Biker), Tim DeZam (Townsman/Nate Meineke), Kevin P. Kearns (Pasco/Luke), Dan Hildebrand (Shaughnessy/Tim Driscoll/Sean Casey) , Julie Ariola (Countess/Mary Winston ), Cleo King (Aunt Lou Marchbanks/Neeta), Dayton Callie (Charlie Utter/Chief Wayne Unser), Paula Malcomson (Trixie/Maureen Ashby), Robin Weigert (Calamity Jane/Ally Lowen), Titus Welliver (Silas Adams/Jimmy O'Phelan), Jamie McShane (Ned Mason/Cameron Hayes), Ray McKinnon (Reverend H.W. Smith/Lincoln Potter), Jim Cody Williams (Terrence/Uncle Vinky). Kim Dickens (Joanie Stubbs/Colette Jane),Keone Young (Mr. Wu/Bohai Lin)