David Madden (Jeopardy! contestant)

David Charles "Dave" Madden is an American game show contestant, academic competition organizer, and art historian. He is a former 19-day champion on Jeopardy! and holds the eighth-longest streak in Jeopardy! history. When Madden established his streak in 2005, it was the second-longest in Jeopardy! history, behind Ken Jennings. He defeated the IBM Watson computer during beta testing at IBM headquarters twice.