Demetri Martin is a comic in New York City. You can see some of his video clips on ComedyCentral linked here. I would classify a lot of his joke into the category of “observational humor” and reminds me a lot of the style of Seinfeld. His joke are relatively clean (relatively speaking as compared to other comedians).
Martin got a degree from Yale and almost got a degree from NYU School of Law (which he had received full scholarship to). But he dropped out of law school to become a comedian one year prior to graduation [source Wikipedia].
Here is an article interview of Martin.