Jon Favreau
Appeared on: "The Fire" (Season 5, Episode 19)
Role on "Seinfeld": Eric the Clown
Since "Seinfeld": Favreau has acted in many films, and he's become one of the preeminent directors in Hollywood over the years with his work on "Elf," the three "Iron Man" films, and the recent remake of "The Jungle Book."
James Spader? Really? Every heard of Pretty in Pink, or Less than Zero, etc etc...