Born to an unnamed mother and father in Brooklyn, New York, Sam's dream from a very early age was to be a Navy SEAL.
After finishing high school, Sam presumably enlisted in the Navy and finally achieved his dream of becoming a SEAL. During his time as a SEAL, Sam served in Bosnia, Afghanistan, and Iraq and while on one mission in Bosnia, Sam along with another member of his unit, Dickerson were both captured and tortured before being buried alive.
Dickerson who was shot later succumbed to his wounds and died while Sam was eventually rescued by the other members of their team.
Sam eventually left the military with the rank of Senior Chief Petty Officer and applied to join NCIS which resulted in him being assigned to the Office of Special Projects in Los Angeles.
NCIS Season 6
Like the other members of the OSP team, Sam made his debut appearance during the Season 6/backdoor pilot episode, Legend Part 1 (episode).