The closest Seagull came to the teams was playing an ex-SEAL chef on some lame movie about eee-vvillll caucasian terrorists taking over a battleship.
Seagal was never a member of any branch of the U.S. military. He was a martial arts instructor in Japan at one time and rumor has that he may have worked as a wet boy for the CIA at one time, but who knows? I get the impression that everything about this guy's career has been embellished.