See, this is what happens when I watch shows that come on at 10pm. I'm too buzzed to keep them straight.
But I just found this article:
-snippest:
On "Justified":
• Jim Beaver, who played independent prospector Ellsworth, popped up on this season as the security guard at the mine where Boyd Crowder briefly worked.
• Brent Sexton, who was would-be Deadwood fireman Harry Manning, played the crooked sheriff of Harlan County.
• W. Earl Brown, aka Al Swearengen's right-hand man Dan Dority, played the hostage-taking convict whom Raylan talked down with a bucket of fried chicken.
• Sean Bridgers, aka Dan's own sidekick Johnny, had a vendetta against Stephen Root's flamboyant judge.
• Peter Jason (aka Con Stapleton, who briefly served as Deadwood's first sheriff) was a Madoff-esque money manager with a collection of Hitler paintings in an early season 1 episode.
On "Sons of Anarchy":
• Titus Welliver (bearded Swearengen associate Silas Adams) played the club's Irish arch-nemesis Jimmy O.
• Paula Malcomson (Al's favorite whore Trixie) was Gemma's counterpart with the club's Belfast charter, as well as the mother of Jax's half-sister.
• Robin Weigert (Calamity Jane) has popped up a few times as one of the club's defense attorneys.
• Cleo King (George Hearst's cook Aunt Lou) plays Abel's babysitter Neeta.
Again, there are others, often in smaller roles on one series or the other (Cameron Hayes on "Sons" was played by Jamie McShane, who was the man Wild Bill and Seth gunned down at the end of the "Deadwood" pilot), and it's clear that both Graham Yost on "Justified" and Kurt Sutter on "Sons" have an abiding affection for "Deadwood" and its actors.
Also, Ray McKinnon, who was the preacher on Deadwood and the prosecutor in last season's SOA, guest-starred in Season 1 of Justified as a hit man sent to kill Raylan Givens.