Mark "Papa" Guardado (November 29, 1961 – September 3, 2008) was a member of the Hells Angels Motorcycle Club and president of the club's San Francisco chapter. He was also an advisor for the television show Sons of Anarchy, which follows an outlaw motorcycle club. Around 3,000 Hells Angels members from all over the United States, as well as Australia, Canada, and Germany, attended Guardado's funeral, which was held in Daly City, California, on September 15.