Mezue ahịrịokwu na-esonụ: Greenstein apụtawo na nke ọ bụla n'ime usoro atọ mbụ nke Poker Superstars Invitational Tournament na oge asaa niile nke usoro GSN "High Stakes Poker". Ọ pụtakwara na oge atọ mbụ nke usoro abalị nke abalị "Poker After Dark" na NBC. Greenstein enwetakwala aha abụọ nke World Poker Tour (WPT): nke ise kwa afọ Jack Binion World Poker Open ($ 1,278,370), na 2006 WPT Invitational na Commerce Casino ($ 100,000). O meriela aha WPT abụọ ndị ọzọ na ihe omume pụrụ iche: WPT Nna na Sons Tournament, 2006 World Poker Finals; na WPT Poker site na Akwụkwọ: Isi nke 2. N'afọ 2008, ọ malitere inye onyinye ego ọ na-enweta maka ọrụ ebere. Na 2008 World Series of Poker (WSOP), Greenstein nwetara ego na ihe omume isii maka ngụkọta nke $ 768,461. O mechakwara nke abụọ na 2008 WSOP Player nke Afọ, n'azụ Erick Lindgren. N'ime
Na 2011, Greenstein gbara ego ugboro ise na World Series of Poker, gụnyere ebe nke atọ na $10,000 Limit Hold'em Championship maka $169,512 na ebe nke iri na ise na $50,000 Player's Championship.