 Complete the following phrase:  Greenstein has appeared in each of the first three series of Poker Superstars Invitational Tournament and all seven seasons of the GSN series High Stakes Poker. He has also appeared in the first three seasons of the late night series Poker After Dark on NBC. Greenstein has also won two World Poker Tour WPT titles: the Fifth Annual Jack Binion World Poker Open 1,278,370, and 2006 WPT Invitational at the Commerce Casino 100,000. He has also won two other WPT titles in special events: WPT Father and Sons Tournament, 2006 World Poker Finals; and WPT Poker by the Book: Chapter 2. As of 2008, he began donating his net winnings to charity. At the 