Gemma also made a guest appearance in Mayans M.C.. Robert "Bobby Elvis" Munson (Mark Boone Junior) is the treasury secretary of SAMCRO.

He's not overly bright (he stores a bloody deer's head under the club's pool table with the intention of mounting it on the wall, but doesn't understand when Jax says it has to be stuffed).

He eventually co-founded the Sons of Anarchy Motorcycle Club with fellow war veteran John Teller as a form of social rebellion and freedom.

Unser eventually grows very close with the Teller family and SAMCRO, frequently intervening in problems to find acceptable solutions and helping prevent infighting among members.

Conflicting loyalties within the Teller family and the club eventually convince Unser to rejoin law enforcement as an ad hoc investigator for Lt. Althea Jarry of the San Joaquin County Sheriffs Department.

She was a meth[13] addict during her pregnancy, which nearly killed Abel, who was born ten weeks premature with a hereditary heart malfunction and a tear in his abdominal wall.

In the episode titled "The Push", Happy is patched in as an official member of the Sons of Anarchy Motorcycle Club- Redwood Original (SAMCRO) charter.

Over the next few episodes, Nero forms an alliance with Jax Teller and offers mentorly advice, such as how to deal with Gemma (in "Toad's Wild Ride").

[21] Gilberto 'Socratoshi' Lopez (Vincent “Rocco” Vargas), A former Mexican born U.S. Army Ranger, good-natured Mixed martial arts fighter, and a full patch member of Mayans M.C., Santo Padre Charter as well as WLR faction.

Neron 'Creeper' Vargas (Joseph Raymond Lucero), an ex-junkie from Los Angeles and a full patch member of the Mayans M.C., Santo Padre Charter and its former Capitan Del Camino (Road Captain).

Gilberto 'Gilly' Lopez (Vincent Vargas), a good-natured mixed martial arts (MMA) fighter, former U.S. Army Ranger, and a full patch member and later Capitan Del Camino of the Mayans M.C., Santo Padre Charter Isaac Packer (JR Bourne, the President of SAMDINO and a former Nomad who became the leader of a drug community based outside of Santo Padre at an encampment dubbed "Meth Mountain".

With Clay's blessing, he returns to Charming to see his teenage son, Charlie Hobart (William F. Nicol), and ends up trying to offer SAMCRO a business deal involving stolen goods to serve as repayment for his past mistake.

committed suicide out of guilt for letting SAMCRO become corrupt and deliberately crashed into the semi-trailer, an act of self-sacrifice to protect his club and family from his mistakes.

Leonard 'Lenny the Pimp' Janowitz (Sonny Barger, a founding member of the Oakland, California chapter of Hells Angels Motorcycle Club).

Phil is responsible for guarding the first shipment of cocaine the club receives from the Galindo cartel along with Miles, new prospect Ratboy and Rafi from the Mayans Oakland Chapter.

'Jury' White (Michael Shamus Wiles) is the former president of the friendly Devil's Tribe Motorcycle Club in Indian Hills, Nevada, which SAMCRO patched over without prior warning in Season 1.

Padraic Telford (Lorcan O'Toole), Chibs' nephew, was accidentally killed in an explosion triggered by Liam O'Neill in an attempt to take out SAMCRO.

Following SAMCRO's arrival in Ireland, in an attempt to bring back Abel, several additional members of the Belfast chapter have appeared on the scene, including 'Geezer' (Jason McDonald), and 'Scrum' (Darren Keefe).

Luann Delaney (Dendrie Taylor) is Gemma's best friend and runs a pornography studio, CaraCara, having received financial backing from Big Otto, her husband.

Lincoln 'Linc' Potter (Ray McKinnon), who in Season 4, episode 2 says he is a Modesto, California native, an eccentric, manipulative assistant U.S. attorney operating out of Charming in season 4 and the head of a joint agency task force targeting the Sons of Anarchy's arms trafficking business under the Racketeer Influenced and Corrupt Organizations Act, as well as the Real IRA and the Galindo cartel.

Declan Brogan (Bart McCarthy), Peter Dooley (Paul Collins) and Brendan Roarke (Bob McCracken) are the council of the Real IRA in Belfast.

Brothers Sean and Michael Casey (Dan Hildebrand and Glenn Keogh) are members of the Real IRA in Belfast, and very close to Father Ashby.

Edmond becomes a rat and is later killed by Agent June Stahl when he starts to run, after punching her in abdomen when she says his father, "da raised an Irish pussy".

Michael McKeavey (Kevin Chapman) is a powerful member of the True IRA who serves as SAMCRO's contact and helps sell illegal weapons through the Sons of Anarchy.

Jimmy O. makes his first appearance in season 2 to personally rectify the Hayes' betrayal of SAMCRO, since the Real IRA has long been dependent on the Sons Of Anarchy's Belfast chapter.

Galen O'Shay (Timothy V. Murphy) is a high-ranking member of the Real IRA, directly involved in SAMCRO's affairs with the Galindo Cartel.

Ernest Darby (Mitch Pileggi) is the head of the Nordics (also known as "Nords"), a white supremacist gang mainly involved in meth trafficking.

He and his son, Russell Meineke (James Harvey Ward), buy weapons from SAMCRO and use them to ambush a prison convoy to free one of their members.

A lieutenant and right-hand man of Ethan Zobelle, A.J is an extremely violent ex-convict and ardent white supremacist, albeit also being a loving single father of two young sons, Cliff and Duke.

Zobelle moved into Charming and presented himself to the townspeople and local law enforcement as the owner of the newly opened Impeccable Smokes cigar shop on the town's Main Street.