Stuart Errol Ungar (September 8, 1953 – November 22, 1998) was a professional poker an gin rummy player, widely considered to have been the greatest player of all time at texas hold 'em and gin rummy. He is the only person to have won World Series of Poker Main Event three times (Johnny Moss also won three WSOPs but his first win was by vote of the players, not by winning a tournament). He is also the only person to win Amarillo Slim's Super Bowl of Poker three times, the world's second most prestigious poker title during its time.