"Big Otto" Delaney (Kurt Sutter) is a member of the Sons of Anarchy Motorcycle Club. Delaney was born in Colma, California on September 29, 1963 and was a member of the Sons of Anarchy's Charming chapter. He is currently imprisoned in Stockton state prison on charges of second-degree murder and vehicle theft, but is still in contact with the club. He seems to be a powerful man on the inside and is the leader of the "Big House Crew", a gang made up of imprisoned Sons of Anarchy members.

His "old lady" is Luann (now deceased) with whom he was deeply in love. Otto has Luann's name tattooed on his left arm.