Barry Greenstein

Barry Greenstein was born on December 30, 1954, in Chicago, Illinois. He grew up in the city and attended Bogan High School. He developed an early love for card games, playing gin rummy and hearts with his family, but it was poker that became his primary interest. After high school, he earned a bachelor's degree in computer science from the University of Illinois at Urbana-Champaign. He then pursued a Ph.D. in mathematics, completing his dissertation but never defending it. To improve his chances of adopting his stepchildren, he took a conventional job at the startup Symantec, working on their first product Q&A. He left the company in 1991 at age 36 to focus on poker full time.

Greenstein began playing poker in the 1970s, initially in home games and later in high-stakes cash games in Los Angeles. His analytical approach, rooted in his mathematical background, quickly set him apart. For years he built his bankroll and reputation in the cash game scene before transitioning to tournaments. His first major tournament victory came in March 2003, when he won Larry Flynt's Poker Challenge Cup for $1 million. After this win, he donated a large portion of his prize to charity, a practice that would define his career.

Greenstein has three WSOP bracelets. His first came in 2004, winning the $5,000 No-Limit Deuce-to-Seven Draw event for $296,200. The following year, he took the $1,500 Pot-Limit Omaha event for $128,505. His third bracelet was in 2008, when he won the $1,500 Seven Card Razz tournament for $157,643. He also has multiple runner-up finishes, including second in the $1,500 Limit Ace to Five Draw in 2004 and second in the $1,500 Seven Card Stud in 2012. At the 2008 WSOP, he cashed six times—including a deep run in the $50,000 H.O.R.S.E. event—totaling $768,461 in winnings, earning him second place in the Player of the Year race behind Erick Lindgren. In 2011, he added five more cashes, including a third-place finish in the $10,000 Limit Hold'em Championship for $169,512 and a 15th in the $50,000 Players Championship. As of 2025, he has 102 WSOP cashes and 172 total live cashes, with lifetime tournament earnings over $8.6 million.

Greenstein has won two WPT Main Event titles. In 2004, he won the Jack Binion World Poker Open, taking first place for $1,278,370. In 2006, he won the L.A. Poker Classic No-Limit Hold'em Invitational for $100,000. He also secured victories in special WPT events: the WPT Father and Sons Tournament, the WPT Poker by the Book: Chapter 2, and the WPT Rock 'n' Roll Poker Open (though the latter is not a main title). He has five WPT final tables and 19 total money finishes.

Greenstein earned the nickname "The Robin Hood of Poker" for donating most of his tournament winnings to charity, primarily Children Incorporated. He often gives away signed copies of his book Ace on the River to players who eliminate him in tournaments, including a hand analysis. His generosity and integrity have made him one of the most respected figures in poker. He is also known for his dry wit and willingness to engage in humorous bets, such as accepting a $10,000 bet from the Two Plus Two forums to say "lol donkaments" on an episode of High Stakes Poker—which he did after winning a hand against Erick Lindgren, later receiving additional donations from amused fans.

Greenstein employs a tight-aggressive, mathematically grounded style. He emphasizes position, pot odds, and opponent tendencies, rarely losing his composure even in large pots. His book Ace on the River covers bankroll management, psychology, and strategic decision-making. He has appeared on all seven seasons of High Stakes Poker, the first three seasons of Poker After Dark, and the Poker Superstars Invitational Tournament. Online, he played under the alias "barryg1" on PokerStars and was a member of Team PokerStars. He also co-founded PokerRoad, a poker strategy and entertainment website, with his stepson Joe Sebok (a former professional player). Greenstein taught his former girlfriend Mimi Tran poker in exchange for Vietnamese lessons.

Inducted into the Poker Hall of Fame in 2011, Greenstein's influence extends beyond his results. He mentored players like Tuan Le, who credited Ace on the River for his success. Greenstein continues to play in WSOP events, as shown by his multiple cashes in 2024 and 2025. His combination of analytical skill, philanthropic spirit, and media presence has made him a lasting ambassador for the game.