14/27) According to an interview with Kurt Sutter, the pilot episode was entirely shot with actor Scott Glenn in the role of Clay Morrow. After deciding to go in a different direction with the character, the role was re-cast with Ron Perlman and Clay's scenes were re-shot.
However, there is still a scene in the pilot where you can spot Scott Glenn as Clay: after they blow up the warehouse at the end of the episode, there is a shot of the Sons running away from the explosion. Scott Glenn can be seen in the foreground.
You can also see Emilio Rivera in the group as he was originally cast as a member of SAMCRO but then re-cast as the leader of their rival gang; The Mayans.
15/27) NBA superstar Carmelo Anthony is featured in a small part in season 7.
16/27) Charlie Hunnam was cast as Christian Grey in Fifty Shades of Grey (2015) but three weeks before the start of the shooting he chose to drop out the film due personal reasons and his busy schedule with Sons of Anarchy.
17/27) Early in season one, after discovering that Tara still had feelings for Jax, Wendy made a statement that unknowingly foreshadowed Tara's death.
The statement was Gemma would never let Tara and Jax be together, and that Gemma would kill her if need be.
18/27) Like David Labrava, another member of the real life motorcycle club Hell's Angels appears on the show.
Sonny Barger, one of the founding members of the Oakland chapter of the Hell's Angels, makes several cameo appearances as Lenny "The Pimp" Janowitz.