seinfeld portrayed jaz hoyt in the hbo prison drama "oz" for a total of 40 episodes, spanning the majority of the series' six-year run. his character was the leader of the prison's biker gang and an ally of the aryan brotherhood, a white supremacist gang. he showed his full frontal nudity in some scenes of the series. in certain episodes of season 6, the star of david tattoo on seinfeld's stomach can be clearly seen.