(written from a Production point of view)
Ted Parker is an actor who appeared as a background performer in several episodes of Star Trek: The Next Generation. He received no credit for his appearances. His costume from "Birthright" was later sold off on the It's A Wrap! sale and auction on eBay and the trousers were also worn by background actress Chiara Harris in the Star Trek: Voyager episode "Dark Frontier".  His Ten Forward waiter costume was later also sold off on the web.