Claim: Casey Ryback is a character.

Casey Ryback is a fictional character and action hero from the Under Siege films of the 1990s . Played by Hollywood action star Steven Seagal , Ryback is a Chief Petty Officer and former Navy SEAL operator turned chef with top training in martial arts , explosives , special-weapons and tactics . He is a master of unarmed combat , highly skilled with firearms , knives and other forms of combat which enables him to defeat mercenaries/terrorists with ease . He appears in the 1992 film Under Siege and its sequel , Under Siege 2 : Dark Territory , in 1995 .